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The niche environment controls stem cell behavior and plasticity, which is important for tissue health and repair.

Aβ afferents do not sprout into the superficial spinal cord layers after nerve injury.

Air pollution (PM10) increases skin inflammation and aging by reducing collagen and may trigger a repair response in skin cells.

Dermal papilla cells help wounds heal better and can potentially grow new hair.

Dermatoscopy is a useful tool for diagnosing hair disorders and can help choose samples for more detailed analysis.

Tissue-resident memory T cells can protect against infections and cancer but may also contribute to autoimmune diseases.

Chemotherapy and bone marrow transplant can cause permanent hair loss.

Some drugs can cause hair loss, and stopping these drugs often leads to hair regrowth.

Scalp cooling can reduce chemotherapy-induced hair loss and should be available in all hospitals.

Nanoparticles can enter the skin, potentially causing toxicity, especially in damaged skin.

The article explains the genetic causes and symptoms of various hair disorders and highlights the need for more research to find treatments.

Mice healed without scars as fetuses but developed scars as adults, suggesting scarless healing might be replicated with further research.

Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.

Minoxidil, propranolol, and furosemide effectively control severe hypertension, but may cause sodium retention.

Alopecia in captive rhesus macaques is affected by season, sex, age, housing, and stress, with complex links between stress hormones and hair loss.

Cannabinoids may help treat chronic and chemotherapy-induced neuropathic pain, but more research is needed to confirm their effectiveness and safety.

Ice-skating athletes often have skin problems due to cold, infections, and inflammation, needing careful treatment and prevention.

LGBT individuals have unique skin health needs, including higher STD risks and side effects from gender-affirming treatments, requiring dermatologists to offer knowledgeable and culturally competent care.

Not eating enough protein can cause hair roots to shrink and lose color, and hair to become thinner.

*Acorus calamus* has many medicinal benefits but needs more safety research.

Minoxidil controls blood pressure effectively, but may cause side effects like hypertrichosis.

Hair and nail changes can indicate health issues, including cancer and side effects from cancer treatments.

An improved scalp reduction technique reduces the need for hair grafts and has minimal complications.

Using steroids can increase the risk of heart problems.

Genetic and environmental factors, like smoking and exercise, affect male hair loss.

Genetically-altered adult stem cells can help in wound healing and are becoming crucial in regenerative medicine and drug design.

The document suggests that the traditional understanding of hair growth cycles and alopecia may be inaccurate and that blood supply plays a significant role in hair growth and loss.

Hair loss in cancer patients can be related to the cancer itself, treatment, or other conditions, and understanding it is important for diagnosis and patient care.

Potassium channel openers show promise for treating heart disease and other conditions, but more research is needed to fully understand their effects and safety.

Most pregnant women experience skin changes like darkening and itching, while serious skin conditions are rare but need early treatment.