Is It Time to See a Dermatologist? 5 Skin Changes You Shouldn’t Ignore

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Whether it’s a suspicious mole, a rough patch, or a persistent rash, early evaluation saves time and your health. Contact us today.

Your skin is your body’s largest organ—and often the first place health problems make themselves visible. While a rash, new mole, or dry patch might seem harmless, some skin changes can signal underlying medical conditions or even skin cancer.

At St. Louis Dermatology & Cosmetic Surgery in Troy, MO, we encourage patients to schedule a skin exam when they notice unusual or persistent changes. Catching issues early often means simpler treatments, better outcomes, and peace of mind.

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Cathy Statler
1 day ago
Excellent! Quick appointments, no waiting for months, on time for appointments too! Solved some trouble I had been seeing another place for in St Louis for 18 months with no progress - St Louis Dermatology solved in 3 months. Very pleased with them, kind & courteous. Recommend to anyone in the Troy Mo area.
Response from the owner:We are thrilled to learn that you had a positive experience with us!
Response from the owner:Thank you so much for leaving us a stellar review!
Kay Miller
5 days ago
Complete Satisfaction!
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Opie G
5 days ago
Everything with my visit went smoothly and the staff were extremely friendly and helpful. Highly recommended, amazing care.
Response from the owner:We are thrilled to learn that you had a positive experience with us!
Joanna Dandino
1 week ago
Everyone is very kind, friendly and professional.
Response from the owner:Thank you so much for leaving us a stellar review!
Maddie Harper
1 week ago
Needed a new dermatologist and made a super easy appointment with them. I see Dr. Jennifer and I absolutely loved her!
Response from the owner:Your feedback is highly appreciated. Thank you for the review!
Rick Tidwell
1 week ago
Both ladies were very professional explained everything in an understandable fashion highly recommend to my friends and relatives. Keep up the good work.
Response from the owner:We appreciate the kind words and are glad we could provide you with a positive experience!
Debbie Smith
1 week ago
Love Jennifer! She is very thorough and so pleasant. Highly recommend them.
Response from the owner:Thanks for taking the time to share your positive experience. We truly appreciate it!
April Llewellyn
1 week ago
I had a great experience at my dermatology appointment. The doctor was very professional, kind, and took the time to thoroughly explain what she was looking for during my exam. I really appreciated how comfortable and informed she made me feel throughout the appointment. The entire experience was positive, and I would definitely recommend this office to others!
Response from the owner:Thank you so much for leaving us a stellar review!
I couldn’t ask for a better group of people to help my family and myself with different procedures. They handle you with such care and talk you through everything.
Response from the owner:We are thrilled to learn that you had a positive experience with us!

1. A Mole That Looks Different From the Rest

Most moles are harmless, but when a mole starts to change, it could be a warning sign of melanoma, the most dangerous type of skin cancer.

Dermatologists use the ABCDE rule to help patients identify concerning moles:

  • Asymmetry: one half looks different from the other
  • Border: edges are irregular or blurred
  • Color: uneven shades of brown, black, red, or white
  • Diameter: larger than a pencil eraser
  • Evolving: changing in size, shape, or symptoms (like itching or bleeding)

👉 If you notice a mole that fits any of these signs, schedule an exam promptly.

2. Rough, Scaly Patches That Don’t Go Away

A persistent rough patch—especially on your face, scalp, or hands—may be more than dry skin. These lesions could be actinic keratoses (AKs), which are considered precancerous.

AKs are caused by years of sun exposure and can progress into squamous cell carcinoma if untreated. Early treatment is quick, effective, and prevents more serious problems later on.

3. A New Growth or Bump That Bleeds Easily

Any new spot on your skin that doesn’t heal within a few weeks should be checked by a dermatologist. This includes:

  • Pink, shiny bumps (often a sign of basal cell carcinoma)
  • Open sores that bleed and scab over repeatedly
  • Raised, firm nodules that continue to grow

Even if painless, these can be skin cancers in early stages. Prompt removal prevents them from spreading and causing disfigurement.

4. Persistent Itching, Rash, or Irritation

Not every rash is a simple allergic reaction. If you experience itching, redness, or irritation that doesn’t respond to over-the-counter creams, it could point to:

Since many skin conditions look similar, only a dermatologist can give a proper diagnosis and personalized treatment plan.

5. Unexplained Changes in Skin Color or Texture

Sudden or unexplained changes in your skin’s appearance can sometimes be a sign of something more serious. Examples include:

  • Darkened patches (hyperpigmentation) – sometimes related to hormonal shifts or sun damage
  • Loss of pigmentation (vitiligo)
  • Thickened, roughened skin (lichenification) from chronic irritation

Even if these changes aren’t harmful, they may be treatable for cosmetic improvement and confidence.

Why Seeing a Dermatologist Matters

Your primary care provider can help with many health concerns, but dermatologists are uniquely trained to:

  • Diagnose skin cancers early before they spread
  • Differentiate between similar-looking conditions
  • Provide advanced treatments like cryotherapy, lasers, and biologic therapies
  • Offer cosmetic and surgical options for both health and appearance
Brandon-Beal

When to Schedule Your Appointment

You should book a dermatology appointment if:

  • You notice a mole changing in size, shape, or color
  • You find a spot or sore that won’t heal
  • You have rough, scaly patches that persist
  • A rash or irritation continues for more than two weeks
  • You want peace of mind with a professional skin exam

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