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In 2019, dermatology and venereology improved skin cancer imaging, advanced in treating skin conditions like psoriasis, and explored the skin microbiome's role in diseases.

Up to half of people experience itchy scalp, often due to skin conditions like seborrheic dermatitis or psoriasis, and treatments vary based on the specific cause.

Alopecia areata is an autoimmune disease where T cells attack hair follicles.

Chemotherapy causes hair loss by damaging hair follicles and stem cells, with more research needed for prevention and treatment.

Endocannabinoids help control mast cell activity in human skin.

Stress increases a factor in mice that leads to hair loss, and blocking this factor may prevent it.

Hair follicles are hormone-sensitive and involved in growth and other functions, with potential for new treatments, but more research is needed.

Chronic stress can cause hair loss by increasing oxidative stress, but antioxidants may help.

Stress might contribute to hair loss in alopecia areata.

Stress hormones and autoimmune reactions can cause hair loss.

Stress may trigger hair loss by affecting immune protection in hair follicles.

The conclusion is that we need more effective hair loss treatments than the current ones, and these could include new drugs, gene and stem cell therapy, hormones, and scalp cooling, but they all need thorough safety testing.

Stress in mice delays hair growth and treatments blocking substance P can partly reverse this effect.

Immune cells affect hair growth and could lead to new hair loss treatments.

Botulinum A toxin injections reduced pain and promoted hair regrowth in a woman with a rare form of alopecia areata.

Chronic scalp pain in trichodynia involves both body-wide and localized increased pain sensitivity.

Insulin helps heal corneal wounds and nerves in diabetic mice by activating the Wnt signaling pathway.

The document concludes that hormonal biomarkers are key for diagnosing hyperandrogenemia in women and hypogonadism in men.

Stress can slow hair growth by affecting certain cells and pathways.

Caffeine may help reduce stress-induced hair loss.

The skin acts like an endocrine organ, making hormones that affect skin diseases and respond to stress.

A dog fully recovered from minoxidil poisoning after receiving treatment.

COVID-19 may worsen Parkinson's disease by affecting certain brain proteins.

Stress may contribute to hair loss in alopecia areata by affecting immune responses and cell death in hair follicles.

Gray hair can potentially be reversed, leading to new treatments.

The document concludes that a new treatment for a type of hair loss called telogen effluvium was tested and shows promise.

Hyaluronic Acid Profhilo® reduces skin inflammation and nerve-related pain in atopic dermatitis.

Extracellular vesicles show promise for medical use but face challenges in standardization and safety.

Alopecia areata patients should have eye check-ups due to increased risk of eye problems.

Auranofin shows promise as a cancer treatment, especially when combined with other therapies.