Medical Dermatology: non-infectious skin diseases (rosacea, seborrheic dermatitis, eczema, etc.), allergic-immunological skin diseases (eczema due to allergies, eczema due to irritation, psoriasis, lupus of the skin, alopecia areata, vitiligo, etc.), cosmetics and aesthetics (acne vulgaris, melasma, freckles, androgenetic alopecia, etc.) sexually transmitted infections (STIs), tropical dermatoses (skin infections due to bacteria, viruses, and fungi), skin malignancies (benign and malignant skin tumors), and skin emergencies (Stevens-Johnson syndrome, erythroderma, and others)