Dermatology

Dermatology, explained from the ground up. This book covers how skin, hair, and nails are built, what goes wrong with them, and how doctors diagnose and treat the results. No science background required. The skin covers about two square meters and makes up roughly 15 percent of body weight, and it replaces most of its surface every month. Ten chapters run in order. The first three build the foundation in structure, cell biology, and immune defense. Chapter 4 covers method. The rest work through the disorders people actually walk into a clinic with. Every technical term gets defined the moment it appears, and each condition ties back to the anatomy taught earlier, so acne stops being a word on a prescription pad and becomes a follicle that plugs. Skin, hair, and nails, chapter by chapter: - The three layers and the cells that build them, including how keratinocytes harden into a waterproof shield and how melanocytes make pigment - Hair follicle anatomy, the growth cycle that sets how long a hair gets, and the nail matrix hidden beneath the cuticle - The bacteria and fungi living on healthy skin, the acid mantle at pH 4.5 to 5.5, and how innate and adaptive defenses hold that population steady - Lesion morphology, dermoscopy, biopsy types, patch testing - Acne vulgaris, adult hormonal breakouts, rosacea subtypes, and hidradenitis suppurativa, then eczema, psoriasis, and contact dermatitis in both its irritant and allergic forms - Impetigo, cellulitis, tinea, candidiasis, warts, herpes simplex, scabies, and lice, closing with drug resistance in dermatologic treatment - Androgenetic alopecia, alopecia areata, telogen effluvium, onychomycosis, nail pitting, paronychia, and the nail changes that signal trouble elsewhere in the body - Retinoids, corticosteroids, lasers, chemical peels, microneedling, melanoma detection, and sun protection Three groups of readers get the most out of it: - Students heading into medicine, nursing, or a skincare profession who want solid ground before the heavy textbooks, or a plain-language companion alongside them - Pharmacy staff, clinic workers, and estheticians who see these conditions every day and want to discuss them with more confidence - Anyone dealing with stubborn breakouts, thinning hair, or a family history of skin cancer who wants to know what is actually happening Every chapter closes with discussion questions and worked example answers so you can check what stuck. A historical timeline traces the field’s growth, starting with ancient Egyptian remedies in the Ebers Papyrus and arriving at the specialty practiced today. A terms and definitions section gathers the vocabulary in one place, and a reference list points toward Fitzpatrick, Bolognia, and the primary research when you want to go further. One hundred forty pages, ten chapters, and a working model of the organ you live inside.