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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Lloyd Stanford
3 days ago
On time.Very cordial,knowledgeable.Highly satisfied.Dr Beal and staff are extremely accomodating.Highly recommend.
Response from the owner:We appreciate the kind words and are glad we could provide you with a positive experience!
Daniel Cook
5 days ago
great experience
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Big D D
5 days ago
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This was my first time going there and I really liked it. The nurses and the doctor were very friendly. They made sure to listen to your concerns and explained the treatments throughly.
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Thomas Bressie
6 days ago
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Heidi Owenby
2 weeks ago
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junnietta shough
2 weeks ago
Secheduling appointment was fast and easy. All staff wonderful! Very friendly and professional. The practitiner was excellent. Took her time and answered all my questions.
Response from the owner:We are thrilled to learn that you had a positive experience with us!
Ralph Miller
2 weeks ago
This is Mary Kay Miller and I have enjoyed coming here for all my skin needs. From when I arrive to checkout everyone has been kind and pleasant and everyones smiling and very knowledgeable
Response from the owner:Thank you so much for leaving us a stellar review!
Eileen Royal
2 weeks ago
This was my first visit and Kayleigh NP was my provider. She was absolutely amazing. She knew what the issue was right away and even realized I also had another issue going on and also addressed that. I appreciate her patience, knowledge , and kindness. I will absolutely be following up with her. She gave me realistic expectations. Thank you very much for your time and help.
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bernie patrico
3 weeks ago
First time going and I’m really satisfied with Dr Beal and staff. Very nice and helpful. Would recommend
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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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