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The skin protects the body, regulates temperature, senses touch, and makes vitamin D.

New biopsy techniques and tools improve alopecia diagnosis, and both too much and too little selenium can cause hair loss.

Modern hair restoration techniques can effectively treat hair loss and provide natural-looking results.

The document concludes that permanent hair loss conditions are complex, require early specific treatments, and "secondary permanent alopecias" might be a more accurate term than "secondary cicatricial alopecia."

Dr. Rasmussen disagrees with Alexander and Schor, emphasizing uncertainty in genital wart transmission and advocating for discussions on potential abuse and referrals in such cases.

Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.

The document concludes that various topical medications are effective for skin conditions but often cause skin irritation as a side effect.

Human skin has multiple layers and functions, with key roles in protection, temperature control, and appearance.

Hair growth is cyclic and influenced mainly by local factors.

Melatonin affects many body functions beyond sleep by interacting with specific receptors in various tissues.

Obesity affects skin health, causing conditions like acanthosis nigricans and may require different treatment approaches.

Human skin can make serotonin and melatonin, which help protect and maintain it.

Human skin makes sexual hormones that affect hair growth, skin health, and healing; too much can cause acne and hair loss, while treatments can manage these conditions.

Melatonin in the skin helps protect against damage from stress and UV rays, and could be used to treat certain skin conditions.

Androgens can cause hair growth in some areas and hair loss on the scalp.

Obesity is linked to various skin problems and may increase the risk of skin cancer.

Oxidative stress contributes to hair graying and loss as we age.

Male hormones and their receptors play a key role in hair loss and skin health, with potential new treatments being explored.

Prolactin affects hair growth and skin conditions, and could be a target for new skin disease treatments.

Pregnancy can cause skin pigmentation, stretch marks, and changes in hair, nails, and sweat glands, with most resolving after birth.

The document concludes that accurate diagnosis of different types of hair loss requires careful examination of hair and scalp tissue, considering both clinical and microscopic features.

Trichoscopy helps diagnose and monitor alopecia areata by looking at a combination of specific hair and scalp features.

The skin protects the body and is constantly renewed by stem cells; disruptions can lead to cancer.

Hidradenitis suppurativa is caused by genetic factors, inflammation, bacteria, hormones, and lifestyle factors like obesity and smoking.

Oestrogens help maintain healthy skin, heal wounds, and may protect against skin aging and cancer.

Prolactin affects the production of different keratins in human hair, which could lead to new treatments for skin and hair disorders.

Epidermal stem cells could lead to new treatments for skin and hair disorders.

Testosterone may slow down wound healing and increase inflammation.

Prolactin may play a significant role in skin and hair health and could be a target for treating skin and hair disorders.

The document explains hair growth and shedding, factors affecting it, and methods to evaluate hair loss, emphasizing the importance of skin biopsy for diagnosis.