| Condition | Description | Typical Management |
|---|
| Cherry angiomas | Bright red, dome-shaped, 1–5 mm; increase with age | None needed; laser/electrocautery if cosmetic concern |
| Petechiae | Pinpoint, non-blanching; thrombocytopenia, vasculitis, trauma | Treat underlying cause; resolve spontaneously |
| Spider angiomas | Central arteriole with radiating legs; blanch with pressure | None; laser/sclerotherapy if desired |
| Acne vulgaris | Comedones, papules, pustules; face, chest, back | Topical retinoids, benzoyl peroxide, antibiotics |
| Contact dermatitis | Erythematous, sometimes papular; pruritic usually | Avoid trigger; topical steroids, barrier repair |
| Rosacea | Centrofacial erythema, telangiectasia, papules/pustules | Topical ivermectin/azelaic acid; oral doxycycline |
| Eczema (atopic dermatitis) | Dry, itchy, lichenified patches; flexural | Emollients, topical steroids/TCIs, trigger avoidance |
| Urticaria (hives) | Transient wheals, pruritic; <24 hr each | H1 antihistamines; omit trigger |
| Viral exanthems | Morbilliform, petechial, vesicular (varicella) | Supportive; antivirals if specific indication |
| Bacterial infections | Impetigo (honey crust), cellulitis (spreading erythema) | Topical/oral antibiotics |
| Skin cancer | BCC (pearly), SCC (scaly), melanoma (ABCDE) | Biopsy → excision, Mohs, radiation, systemic |
When to See a Dermatologist
- Lesions changing in size, color, shape
- New lesions after age 40
- Bleeding, ulceration, rapid growth
- Personal/family history of skin cancer
- Immunosuppression
Accurate diagnosis requires clinical exam ± dermoscopy ± biopsy. Self-treatment risks delay and complications.
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