Dermatology – Common Skin Conditions in Primary/Urgent Care

These flashcards cover key conditions, causes, treatments, and important characteristics of common skin conditions as outlined in the lecture.

Cellulitis (Non-purulent)

Infection commonly caused by Strep pyogenes or S. aureus, treated with Cephalexin.

First-Line Treatment for Purulent Cellulitis

Trimethoprim–Sulfamethoxazole (TMP-SMX DS) BID for 7–10 days.

Abscess / Boil (Furuncle)

Commonly caused by S. aureus; treatment includes Incision & Drainage (I&D) and warm compresses.

Impetigo

A highly contagious skin infection caused by S. aureus and Strep pyogenes, treated topically with Mupirocin.

Tinea Corporis

Also known as Ringworm; treated with topical Terbinafine or oral antifungals.

Tinea Pedis (Athlete’s Foot)

An infection caused by T. rubrum or T. mentagrophytes, treated with topical antifungal.

Tinea Capitis

Scalp infection treated with oral Griseofulvin or Terbinafine, ineffective with topical treatments alone.

Contact Dermatitis

Caused by irritants like chemicals; treated with topical Hydrocortisone and avoidance of triggers.

Eczema (Atopic Dermatitis)

A chronic inflammatory condition, treated with emollients and topical steroids.

Scabies

A mite infestation treated with Permethrin cream; all household contacts should be treated.

Herpes Zoster (Shingles)

Reactivation of Varicella Zoster Virus; best treated with Valacyclovir within 72 hours.

Acne Vulgaris

A skin condition treated with topical Benzoyl Peroxide and oral Doxycycline.

Hives (Urticaria)

An allergic reaction treated with antihistamines like Cetirizine and possibly steroids.

Erysipelas

A form of cellulitis characterized by well-demarcated red rash, usually treated with Penicillin.

Skin Lesion Appearance of Impetigo

Characterized by honey-colored crusts, primarily around the mouth/nose.

Skin Lesion Appearance of Tinea

Features a ring-shaped border with central clearing.