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Lasers are effective for some skin conditions but can cause side effects like scarring and pigment changes; careful selection is important, and botulinum toxin type A is successful in reducing sweat in palmar hyperhidrosis.

Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.

Skin ages and changes due to sun, wind, and aging, causing dryness, thinning, and hair loss.

A 42-year-old woman had a scalp lesion that didn't cause hair loss and showed specific changes under a microscope.

Genetics, stress, and health issues can cause early hair greying, which affects self-esteem, and there's no cure, only hair dye.

Melasma is a skin condition linked to female hormones, genetics, UV exposure, and certain medications, but not to pituitary, adrenal, or thyroid diseases.

Treating melasma in men is difficult, especially for the deeper skin layers, and may need more than just topical treatments.

Three Iranian men had reddish-brown facial pigmentation with no effective treatment.

The study found increased skin pigmentation and variable melanocyte density in a patient with Addison's disease.

Hair color is determined by melanin and can be affected by genetic conditions like albinism.

Hair and nail disorders can cause changes in scalp pigmentation, especially with sun exposure and alopecia.

Vitamin B12 deficiency can cause reversible skin darkening.

PmtHEE is a better model for studying pigmented skin because it includes melanocytes and shows improved cell differentiation.

A 91-year-old woman's hair turned black in one spot, with skin changes underneath.

Understanding genes can help diagnose and treat skin color disorders.

Oral pigmentation can be a sign of Addison's disease.

Forensic DNA Phenotyping can help predict physical traits from crime scene DNA to identify suspects.

Vitamin B12 deficiency can cause skin and hair color changes, which can be reversed with treatment.

Skin pigmentation increases in CRPS-affected areas and improves with symptom relief.

Certain genes control the color of human hair by affecting pigment production.

Melanin and melanocytes contribute to the brown pigmentation in stasis dermatitis.

Vitamin B12 deficiency can cause facial dark spots that go away with treatment.

Hair color is determined by melanin produced and transferred in hair follicles.

A new gene mutation may allow some piebaldism patients to regain skin color in white patches.

Higher PHGDH levels cause unusual melanin buildup in hair follicles.

The research found that a specific skin cell type not only triggers hair growth but also controls hair color, and that aging can lead to hair loss and color changes.

Darker skin in 10-year-old girls may be an early sign of puberty.

Pigmented papules on the ear can be a rare skin condition called cutaneous amyloidosis, treatable with topical tretinoin.