When to See a Dermatologist: Signs You Should Not Ignore

Not Everything Needs a Specialist (But Some Things Do)

Primary care and telehealth can handle most common skin concerns — acne, eczema, rosacea, straightforward rashes. But certain skin findings warrant a dermatologist's eye, specialized tools, and procedural capabilities. Knowing the difference saves you time when a specialist is not needed and saves your health when one is.

Urgent: See a Dermatologist Soon

Changing Moles

The ABCDE rule exists for a reason:

• A — Asymmetry: One half does not match the other
• B — Border: Irregular, ragged, or blurred edges
• C — Color: Multiple colors (brown, black, red, white, blue) within one lesion
• D — Diameter: Larger than 6mm (pencil eraser), though melanomas can be smaller
• E — Evolving: Any change in size, shape, color, or symptoms (itching, bleeding)

Any mole that is changing deserves evaluation. The "ugly duckling" sign is equally important — a mole that looks different from all your other moles.

Melanoma caught early has a 99% five-year survival rate. Caught late, it drops below 30%. This is one area where delay has real consequences.

Non-Healing Wounds

A sore that will not heal within 3-4 weeks — especially on sun-exposed areas like the face, ears, scalp, hands, or arms — can be skin cancer (basal cell or squamous cell carcinoma). These often look like:

• A pearly or waxy bump
• A flat, flesh-colored or brown scar-like lesion
• A scabby sore that heals and returns
• A red, scaly patch that persists

Do not dismiss a persistent wound as "just a scratch that will not heal."

Rapidly Growing Lesions

Any skin growth that appears quickly and grows rapidly needs evaluation. While many rapid growths are benign (keratoacanthomas, pyogenic granulomas), some are aggressive cancers. Speed of growth warrants urgency.

New Lesions in Immunosuppressed Patients

If you are on immunosuppressive medications (organ transplant recipients, biologics, chronic steroids), your skin cancer risk is dramatically elevated. Any new or changing lesion should be evaluated promptly.

Important: Schedule a Dermatologist Within a Few Weeks

Suspected Psoriasis

Thick, silvery plaques on the elbows, knees, scalp, or lower back that are not responding to over-the-counter treatments. Psoriasis is a systemic inflammatory condition linked to cardiovascular disease, psoriatic arthritis, and metabolic syndrome. It benefits from specialist management, including biologics for moderate to severe cases.

Extensive or Refractory Eczema

Mild eczema is manageable with moisturizers and topical steroids. But if your eczema covers large areas, keeps flaring despite treatment, or requires frequent steroid courses, a dermatologist can offer patch testing (to identify triggers), phototherapy, or systemic treatments like dupilumab.

Hair Loss Patterns Suggesting Scarring Alopecia

Most hair loss (androgenetic alopecia, telogen effluvium) can be managed by primary care or telehealth. But hair loss with scalp scarring, pain, redness, or pustules may indicate scarring (cicatricial) alopecia — a group of conditions that permanently destroy hair follicles. Early dermatologic intervention can prevent progression.

Skin Rashes That Stump Your Primary Provider

If your doctor cannot confidently diagnose a rash after examination, a dermatologist's trained eye (and potential biopsy) can provide answers. Skin biopsies are quick, minimally invasive, and often diagnostic.

Chronic Urticaria (Hives)

Hives lasting more than 6 weeks that are not explained by an obvious allergy. Chronic urticaria has different causes and treatments than acute hives.

Routine: Schedule When Convenient

Annual Skin Checks

If you have any of the following risk factors, annual full-body skin exams are recommended:

• Personal history of skin cancer
• Family history of melanoma
• Fair skin, light eyes, history of sunburns
• History of tanning bed use
• Many moles (50+)
• Immunosuppression
• History of organ transplant

For average-risk individuals without the above factors, the recommendation is less clear. Self-skin exams monthly with dermatologist evaluation for anything concerning is reasonable.

Cosmetic Concerns

Dermatologists are the most qualified providers for:

• Laser treatments
• Chemical peels beyond basic glycolic
• Mohs surgery for skin cancer
• Cyst and lipoma removal
• Scar revision
• Injectable treatments for specific skin conditions

What Telehealth and Primary Care CAN Handle

You do not need a dermatologist for every skin issue. Many conditions are effectively managed without a specialist:

• Acne — including prescription topicals and oral medications
• Rosacea — topical and oral treatments
• Common rashes — contact dermatitis, fungal infections, viral exanthems
• Hair loss evaluation — initial workup and common treatments (minoxidil, finasteride, spironolactone)
• Eczema — mild to moderate, first-line treatments
• Warts — common, non-genital warts
• Skin infections — cellulitis, impetigo, herpes simplex

Starting with your primary care provider or telehealth for these conditions saves weeks of waiting for a dermatology appointment.

The Wait Time Problem

The average wait for a new dermatology appointment in the US is 35 days. In some areas, it is 3-6 months. This is why knowing when to go matters:

• Truly urgent findings (changing moles, non-healing wounds) justify calling and emphasizing urgency. Ask to be put on a cancellation list.
• Less urgent but important findings can wait for a scheduled appointment.
• Common conditions can start treatment through primary care or telehealth while you wait.

The Bottom Line

Your skin is your largest organ. Most of what it does is reassuringly normal. But certain signs — changing moles, non-healing wounds, rapid growths, and treatment-resistant conditions — warrant specialist evaluation.

At Coral, we evaluate skin concerns via telehealth and help determine whether specialist referral is needed. We treat what we can and refer appropriately when we cannot. [Start your visit](/start) and let us take a look.