Hair Disorders Induced by External Factors
External factors may result in hair loss, increased hair growth, or changes in the color and texture of the hair.
External factors responsible for hair loss are drugs, radiation, traction, fungi, pesticides, plant toxins, heavy metals, and several other chemicals.
Several groups of drugs may be responsible for unintentional induction of hair growth.
Texture and color of hair may be changed by drugs, metals, and ultraviolet and other radiation.
Full recovery is the rule after elimination of the responsible factor.
KeywordsAlopecia Hair loss Hair disorder Anagen Catagen Telogen Hirsutism Hypertrichosis
- Bismuth C, Gaultier M, Conso F (1977) Aplasie médullaire aprés intoxication aiguë à la colchicine. Nouv Press Med 6:1625–1629Google Scholar
- Hamilton A, Biganzoli L, Coleman R, Mauriac L, Hennebert P, Awada A, Nooij M, Beex L, Piccart M, Van Hoorebeeck I, Bruning P, de Valeriola D (2002) EORTC 10968: a phase I clinical and pharmacokinetic study of polyethylene glycol liposomal doxorubicin (Caelyx, Doxil) at a 6-week interval in patients with metastatic breast cancer. European Organization for Research and Treatment of Cancer. Ann Oncol 13:910–918PubMedCrossRefPubMedCentralGoogle Scholar
- Litt JZ (2007) Drug eruption reference manual, 13th edn. Informa Healthcare, LondonGoogle Scholar
- Scott DL, Smolen JS, Kalden JR, van de Putte LB, Larsen A, Kvien TK, Schattenkirchner M, Nash P, Oed C, Loew-Friedrich I (2001) Treatment of active rheumatoid arthritis with leflunomide: two year follow up of a double blind, placebo controlled trial versus sulfasalazine. Ann Rheum Dis 60:913–923PubMedPubMedCentralCrossRefGoogle Scholar
- Sinclair R, Grossman KL, Kvedar JC (2003) Anagen hair loss. In: Olsen EA (ed) Disorders of hair growth: diagnosis and treatments, 2nd edn. McGraw-Hill, New York, pp 275–302Google Scholar
- UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation) (1982) Ionizingradiation: sources and biological effects, United Nations ed., New York, E.82.IX.8Google Scholar
- WHO (World Health Organization) (2010) Environmental Health Criteria 224: arsenic and arsenic compounds World Health Organization, Geneva (2001): 1–108Google Scholar