abnormal (hair)

• dark colored hair contains true melanin
• Causes of Hair Fall


  • Chemotherapy
  • Systemic lupus erythematosus
• Androgenic Alopecia


  • Male-pattern baldness
  • Most common form of baldness in men
  • Inhibition of hair growth by androgens

  
• Hirsutism


  • Excessive body hair in females & prepubertal males
  • Caused by tumor of the adrenal glands, testes, or ovaries that produces excessive amounts of androgens
• Split ends


  Cuticle tends to wear away at the tip of the shaft, allowing the keratin fibrils in the inner hair regions to frizz out
• Pediculosis Capitis


  Infestation of the hair and scalp by Pediculus humanus capitis (kuto)
• Dandruff


  Seborrheic dermatitis
• pheomelanin (yellow to red) gives hair reddish or yellowish hue depending on the amount of black eumelanin present.
• eumelanin (brown to black) responsible for dark colors in skin, eyes, hair.
• Blond red hair contains variants of melanin in which there is iron & more sulfur
• graying hair causes a progressive decline in tyrosinase (melanin)
• diffuse alopecia refers to a general thinning of scalp hair across the entire scalp rather than in specific, localized areas. (chemotherapy)
• Cicatrical or non cicatrical - Systemic lupus erythematosus

  
• Alopecia areata causes:

  1. Genetic factors: tend to run in families.
  2. Autoimmune factors: immune system mistakenly attacks hair follicles.
  3. Environmental triggers: 

  
• Alopecia Totalis (AT) complete loss of hair from the scalp and body