When it comes to your skin, getting professional advice is one of the smartest decisions you can make. But before you even step into a dermatologist’s office, there are a few pitfalls that could delay your diagnosis, make symptoms worse, or simply waste your time. Whether it’s showing up unprepared or experimenting with TikTok trends, these are the most common mistakes you’ll want to avoid.
1. Using Harsh Home Remedies
It’s tempting to raid your kitchen cupboard or try a social media hack when you notice a new rash or breakout. After all, what harm could a little lemon juice or toothpaste do? Quite a lot, actually. Many DIY treatments are highly acidic or abrasive, and can damage the skin’s natural barrier—making your condition worse before you even make it to your appointment.
Another issue is that these remedies often mask the real problem. By irritating your skin, they can trigger inflammation or even allergic reactions that weren’t part of the original issue. This makes it harder for your dermatologist to pinpoint the root cause. What started as a mild case of eczema or acne can quickly spiral into something that looks entirely different.
These treatments also delay proper care. When people see temporary relief from redness or swelling, they might hold off on seeking expert help, thinking they’ve cracked the code. But skincare isn’t one-size-fits-all, and what works for one person might backfire for another. Your skin’s health is too important to gamble with guesses.
So, if you’re tempted to apply vinegar, baking soda, or anything else you wouldn’t normally put on your face—hold off. Take a photo of the issue, note how it changes over time, and bring that information to your dermatologist. They’ll appreciate a clean, unaltered view of what’s really going on.
2. Delaying the Appointment for Too Long
Many people wait far too long before seeing a dermatologist—often until their skin issue has become persistent, painful, or embarrassing. Whether it’s out of fear, cost concerns, or thinking “it’ll go away on its own,” delaying professional care is one of the biggest mistakes you can make. Most skin conditions are far easier to treat in their early stages.
The longer you wait, the more complex the treatment could become. For instance, what starts as a small lesion could evolve into a pre-cancerous growth. Or a patch of psoriasis that might have responded well to topical creams might later require oral medications or light therapy. In short, early intervention often leads to better outcomes.
There’s also the emotional toll to consider. Skin problems aren’t just physical—they can chip away at your confidence, affect your social life, and even impact your mental health. Don’t underestimate how much relief you can feel just by having a professional explain what’s going on and how to treat it.
If you’ve been putting off that appointment, take this as your sign to book it. Dermatologists have seen it all before, and there’s no shame in asking for help—no matter how “minor” you think the issue is.
3. Overusing Over-the-Counter Products
When your skin flares up, it’s easy to reach for anything on the pharmacy shelf that claims to help. But loading your face with multiple creams, serums, and spot treatments can actually backfire. Many over-the-counter (OTC) products contain active ingredients like salicylic acid, benzoyl peroxide, or retinol—which can be too strong when used in combination or too often.
The issue isn’t just about strength. Different ingredients can react badly when layered. You might unintentionally dry out your skin, trigger further breakouts, or even cause a condition known as contact dermatitis—an inflammatory reaction to something you’ve applied. In trying to fix the problem, you can actually make it worse.
There’s also the misconception that more is better. Some people use these products multiple times a day in the hope of speeding up results. But skincare doesn’t work that way. Skin cells regenerate on a cycle, and aggressive treatment can strip the natural oils that keep your skin balanced and healthy.
Before you go wild at the chemist, keep things simple. Stick to a basic routine until your dermatologist can assess what’s going on. Bring along any products you’ve been using—they’ll be able to spot if something in the mix is contributing to the problem.
4. Stopping Prescribed Treatments Early
You’d be surprised how many people abandon their prescribed treatment plan the moment they see improvement. Whether it’s an antibiotic cream, an oral medication, or a steroid, stopping too soon can allow the condition to return—sometimes even worse than before. This is especially true for infections and inflammatory conditions like acne or eczema.
The reason treatments are prescribed for a specific length of time is to fully eliminate the issue. Cutting it short can lead to resistance in some cases (like antibiotics) or incomplete healing. You might feel like you’re in the clear, but the problem may be simmering under the surface, ready to flare up again.
There’s also a psychological component. Once someone feels better, they may forget the importance of following medical advice. They’ll shift back to old habits or start experimenting with new products, disrupting the progress they’ve made. It can be frustrating for both patient and dermatologist to have to start over.
If you’re unsure whether to continue, don’t decide on your own. Always consult your dermatologist before stopping or changing any treatment. They can help you taper off safely or suggest alternatives based on how your skin is responding.
5. Not Taking Note of Symptoms and Triggers
Your skin doesn’t exist in a vacuum—it reacts to everything from the weather to what you eat. One of the most common mistakes people make before seeing a dermatologist is failing to keep track of their symptoms and what might be triggering them. That lack of information can make it harder for your dermatologist to connect the dots and reach an accurate diagnosis.
For instance, if your eczema flares up every time you wear wool or use a certain detergent, that’s vital information. Likewise, if your acne gets worse around your menstrual cycle or after certain foods, these patterns are incredibly helpful to note. But many people forget or dismiss these details as irrelevant.
Even tracking the timeline of symptoms can make a big difference. Did a rash appear suddenly or gradually? Was there an injury, a new product, or travel involved? The more context you provide, the better your dermatologist can evaluate potential causes and treatment plans tailored to your lifestyle.
So before your appointment, jot down notes or take photos when something changes. Keep a mini symptom diary for a week or two, if possible. Your dermatologist will appreciate it, and it could mean the difference between guesswork and targeted, effective treatment.
6. Wearing Makeup to the Appointment
You might want to look presentable, especially if you’re heading to your appointment straight from work or meeting others afterwards. But wearing makeup to a dermatology consultation—especially when you’re seeking advice about a facial concern—can seriously hinder your doctor’s ability to assess your skin properly.
Makeup can mask the true condition of your skin, hiding blemishes, redness, pigmentation, or dryness. Even subtle products like BB cream or tinted moisturiser can change how your skin appears under examination. That could lead to misdiagnosis or delay in treatment, especially if you’re dealing with conditions like rosacea, melasma, or acne.
It’s also not just about your face. If you’re using body lotion, fake tan, or perfume in areas where you’re experiencing issues, these too can interfere with a clear diagnosis. Ideally, your skin should be as clean and product-free as possible before your consultation.
If you absolutely must wear makeup beforehand, bring removal wipes and arrive early enough to take it off. Your dermatologist will thank you, and you’ll likely get a more accurate evaluation of your skin’s condition.
7. Not Bringing a List of Questions or Concerns
It’s surprisingly easy to walk into a medical appointment and forget everything you meant to ask. You might feel flustered, rushed, or simply overwhelmed. Not bringing a list of your questions or concerns means you risk leaving without the answers you came for.
A written list helps you stay focused during the consultation. It ensures you won’t forget important issues, even if they’re minor or feel awkward to bring up. Whether you’re worried about a new mole, curious about treatment side effects, or want to know how a certain skin condition might affect your daily routine—write it down.
Doctors often appreciate patients who come prepared. It shows you’re engaged and want to understand your health. A well-organised list also helps your dermatologist prioritise what to address within the time available, making your visit more productive.
Try to rank your concerns in order of importance, and leave space to jot down notes during the appointment. That way, you’ll walk away with clear answers and next steps instead of fuzzy memories and lingering doubts.
8. Trying to Self-Diagnose Online
We’ve all done it—typed in a symptom and found ourselves spiralling through pages of Google results or social media “experts” offering unsolicited advice. While the internet can be a helpful resource, relying on it to self-diagnose is one of the most misleading things you can do before seeing a dermatologist.
Skin conditions can look strikingly similar to one another. What you assume is fungal could be eczema. What looks like acne might be perioral dermatitis. Even something as serious as skin cancer can resemble a harmless mole in its early stages. That’s why professional evaluation is so crucial.
Self-diagnosis can also increase anxiety. You might convince yourself you have something far more serious than you actually do, leading to unnecessary stress. Or worse, you might downplay a real issue because it “looks normal” according to photos online.
By the time you arrive at your appointment, you may be so invested in your own theory that you’re less open to the dermatologist’s perspective. Approach the appointment with curiosity, not conclusions. Trust their training and let them do the diagnosing—you’ll get better results that way.
9. Skipping Details About Your Medical History
Many people assume that their skin issue is isolated and doesn’t relate to the rest of their health. But dermatology isn’t just skin-deep. Failing to share relevant parts of your medical history—like allergies, medications, or chronic conditions—is a big mistake that can impact your diagnosis and treatment.
For example, autoimmune conditions such as lupus or thyroid issues often show up through skin changes. Medications for blood pressure, mental health, or cholesterol can also cause rashes, pigmentation, or sensitivity. Even a recent cold or travel history might offer important clues.
There’s also your family history to consider. Conditions like psoriasis, eczema, and melanoma often run in families. If you don’t mention that your parent or sibling had similar issues, your dermatologist might miss a key piece of the puzzle.
Before your appointment, take a moment to list any medications you’re on (including supplements), past diagnoses, allergies, and relevant family history. It might not seem connected to your skin issue—but more often than not, it is.
10. Not Mentioning Mental Health Factors
We often separate skin health and mental health, but the two are closely linked. Stress, anxiety, and depression can all trigger or worsen skin conditions like acne, eczema, psoriasis, and even hair loss. Yet many people leave mental health out of the conversation entirely when they visit a dermatologist.
That’s a missed opportunity. Understanding your mental health context can help your dermatologist offer more effective and compassionate care. If stress is contributing to flare-ups, they might suggest lifestyle changes or refer you to a therapist in addition to prescribing medication.
It also helps your dermatologist explain treatment timelines more sensitively. For example, someone with anxiety may benefit from a more structured follow-up plan or reassurance about side effects. Dermatologists aren’t there to diagnose mental health conditions—but they can tailor care around how you’re feeling.
Don’t be embarrassed to mention your emotional wellbeing. A simple “I’ve been quite stressed lately” can open up a helpful dialogue that improves your treatment and supports your overall health.
11. Assuming All Dermatologists Are the Same
Not all dermatologists have the same areas of expertise. Just as there are heart specialists and orthopaedic surgeons, dermatology too includes subspecialties—such as cosmetic dermatology, paediatric dermatology, dermatopathology, and surgical dermatology. One of the big mistakes people make is assuming that any dermatologist will be the right fit for any skin concern.
If you’re dealing with a cosmetic concern like acne scarring or pigmentation, you might want to see a dermatologist with experience in laser treatments or chemical peels. On the other hand, if you’re worried about a changing mole, you’ll need someone skilled in skin cancer screening and surgical procedures. Booking with the wrong specialist might delay the care you really need.
There’s also a difference between private and NHS dermatology services in the UK. Some consultants may focus mainly on medical conditions, while others offer a range of cosmetic treatments. Understanding this distinction and doing a little research before you book can save you both time and frustration.
Before your visit, check the dermatologist’s profile, reviews, and specialisms. If you’re not sure what kind of expert you need, don’t be afraid to ring the clinic in advance. A quick conversation with the receptionist can help point you in the right direction and ensure you’re matched with the best person for your concern.
12. Expecting Instant Results
This one’s especially common in the age of instant gratification. People often assume that seeing a dermatologist will lead to immediate results—whether it’s clearer skin, a diagnosis, or a miracle cure. But most dermatological treatments take time to show effects, and some conditions require several appointments to get under control.
Dermatology is about working with your skin’s natural cycle, not overriding it. Many treatments—like topical creams or oral medications—can take weeks or even months before significant improvements are visible. Expecting overnight results can lead to disappointment, impatience, and the temptation to abandon treatment too early.
Also, some conditions are chronic and require long-term management rather than a one-time fix. Psoriasis, rosacea, and eczema often require ongoing adjustments to treatment plans, and that means patience and open communication are key.
So, go in with realistic expectations. Trust the process, stick to the plan, and understand that your dermatologist’s goal is long-term improvement—not just a quick win. If you’re ever unsure or frustrated, speak up. Most dermatologists would rather adjust your treatment than have you silently give up on it.
Final Thoughts
Preparing to see a dermatologist is about more than just booking an appointment—it’s about making the most of that time, avoiding unnecessary setbacks, and giving yourself the best chance at healthier skin. From skipping makeup to tracking symptoms, every small decision you make beforehand can have a big impact on your care.
Dermatologists aren’t there to judge your choices—they’re there to help. But the more open, informed, and prepared you are, the better the outcome tends to be. Avoiding these twelve common mistakes puts you ahead of the curve and helps your dermatologist focus on what really matters: giving you the best treatment for your individual needs.
So if you’re considering a consultation, now’s the time. And if you’ve made one or two of these mistakes before—don’t worry. Most people have. The important thing is that you’re taking your skin health seriously and seeking expert support.
If you’d like to book a consultation with an expert dermatologist in London, you can contact us here at The London Dermatology Centre—we’d be happy to help.
References
- National Institute for Health and Care Excellence (NICE), 2023. Acne vulgaris: management. [online] London: NICE. Available at: https://www.nice.org.uk/guidance/ng198 [Accessed 6 May 2025].
- British Association of Dermatologists (BAD), 2024. How to get the most out of your dermatology appointment. [online] =
- Laughter, D., Maymone, M.B.C. and Vashi, N.A., 2021. “Mental health and dermatology: What’s the connection?”. Clinics in Dermatology, 39(1), pp.70–76.
- British Medical Journal (BMJ), 2020. Delays in diagnosis and treatment of skin cancers in primary care: a UK-based study. BMJ Open, 10(8), e035370.
- NHS, 2024. Topical corticosteroids. [online] NHS.