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A man's chest hair turned white after a shingles infection, possibly due to virus-damaged pigment cells.

Stem cells help repair tissue mainly by releasing beneficial substances, not by replacing damaged cells.

Hair from people with seborrheic dermatitis is thicker scaled, more damaged, and thinner than healthy hair, and atomic force microscopy can help monitor the condition.

Hair conditioners with argan oil or camellia oil improve the strength and color of bleached hair.

The document concludes that while some hair and scalp disorders can be treated, hair loss from destroyed follicles is permanent, and damaged hair can only regrow naturally.

Horizontal scalp biopsy sections are better for diagnosing alopecia areata, showing fewer hair follicles and more miniaturized hairs.

Alopecia areata may appear differently depending on the individual's type of hair loss and scalp condition.

Radiation mainly affects keratinocyte stem cells, not melanocyte stem cells, causing hair to gray.

Extreme weight loss from crash dieting can cause significant hair loss.

Hair relaxers are linked to reduced cystine levels and potential hair damage.

Hair problems can be caused by genetics or the environment, and treatment should focus on the cause and reducing hair damage.

Chemotherapy caused hair loss with specific patterns, but most patients had hair regrowth after treatment, while some had lasting hair loss.

The conclusion is that skin and hair patterns are formed by a mix of cell activities, molecular signals, and environmental factors.

Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.

The cause of alopecia areata is likely a mix of genetics, immune system issues, and environmental factors, with more research needed to understand it fully.

Two teenage brothers had a rare, treatment-resistant form of female-pattern hair loss with unusual scalp changes.

The "Punch Assay" can regenerate hair follicles efficiently in mice and has potential for human hair regeneration.

The document concludes that understanding hair loss and considering medical treatments like minoxidil and finasteride before surgery is important, especially for young patients with rapid hair loss, and that hairline design varies among different ethnicities.

Impaired autophagy may cause hair loss by triggering early catagen.

Trichoscopy helps diagnose hairline recession causes in Egyptian women, with androgenetic alopecia being the most common.

Non-invasive methods can effectively diagnose and manage alopecia areata.

Erosive pustular dermatosis of the scalp causes painful, scarring skin lesions on the scalp, mainly in elderly people with sun-damaged skin.

Acne keloidalis nuchae is a chronic skin condition more common in African men, causing itchy or painful bumps and can lead to permanent hair loss if not treated early.

Trichotillomania is a condition where people repeatedly pull out their hair, which can be triggered by stress and has various physical signs.

The patient's hair loss is most likely due to diffuse alopecia areata.

Male hair loss is mainly due to thinner hair, not less hair.

The document concludes that individualized treatments for hair issues are effective, certain hair changes can indicate neurocutaneous diseases, specific lotions improve skin health, laser hair removal works but needs more study on long-term effects, men's cosmetics are diverse, peeling is effective but can have side effects, and facial pigmentation is often due to overactive skin cells.

Herbal ingredients like aloe vera and hibiscus can help with hair problems like hair loss and dandruff.

Alopecia areata is an autoimmune condition causing hair loss, influenced by genetics, stress, and diet, and may be prevented by a high soy oil diet.

Scalp dermoscopy is good for diagnosing a type of hair loss and helps choose the best spots for biopsy.