Medical Questions · Skin Concerns
Skin Concerns — Questions Answered
Acne, rosacea, eczema and psoriasis, skin cancer warning signs, melasma, sun damage, and anti-aging skincare — answered in plain language.
What causes acne?
Acne develops when pores become clogged with oil and dead skin cells, allowing bacteria to multiply and inflammation to form. Hormones are a major driver, which is why acne is common in adolescence and can flare with hormonal changes in adulthood. It is not caused by poor hygiene, and persistent or scarring acne is very treatable with the right plan from a dermatologist.
What is rosacea and how is it treated?
Rosacea is a chronic condition that causes facial redness, flushing, visible vessels, and sometimes acne-like bumps, usually across the cheeks and nose. Common triggers include sun, heat, alcohol, spicy food, and stress. While there is no cure, it is well managed with trigger avoidance, prescription topicals or oral medications, and laser or light treatments — best guided by a dermatologist.
What's the difference between eczema and psoriasis?
Both cause red, irritated patches, but they differ. Eczema is typically very itchy, linked to a compromised skin barrier and allergies, and often appears in skin folds. Psoriasis is an autoimmune condition that produces thicker, well-defined plaques with silvery scale, commonly on elbows, knees, and the scalp. A dermatologist can distinguish them and tailor treatment.
How do I know if a mole could be skin cancer?
Dermatologists use the ABCDE guide: Asymmetry, irregular Borders, uneven Color, Diameter larger than a pencil eraser, and Evolving or changing over time. Any new, changing, bleeding, or unusual spot should be examined by a dermatologist. Self-checks are useful for awareness, but only a professional can diagnose skin cancer, and early detection is highly effective.
What causes melasma and can it be treated?
Melasma is a common condition causing brown or gray-brown patches, usually on the face, driven by a combination of sun exposure and hormones (it often appears with pregnancy or hormonal medications). It can be improved with diligent sun protection, topical treatments, and certain in-office procedures, but it tends to recur, so ongoing management and a dermatologist's guidance matter.
How does sun damage affect the skin?
Ultraviolet exposure is the leading cause of premature skin aging — fine lines, wrinkles, brown spots, broken vessels, and rough texture — and it is the primary risk factor for skin cancer. Much of this damage accumulates over years, which is why daily sun protection is the single most effective anti-aging and preventive step you can take.
What's the best way to prevent premature skin aging?
The most evidence-backed steps are consistent daily sun protection, not smoking, and a simple routine that may include a retinoid and antioxidants suited to your skin. Beyond that, in-office treatments can address existing damage. A dermatologist can build a regimen matched to your skin type and goals rather than a one-size-fits-all approach.
When should I see a dermatologist?
See a dermatologist for any new, changing, or non-healing skin spot; for acne, rosacea, eczema, or psoriasis that is persistent, painful, or scarring; and for a periodic skin-cancer screening, especially if you have significant sun exposure or a family history. When in doubt, an exam is worthwhile.
This information is provided for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified, board-certified physician about your individual situation.