Risk factors



Several risk factors that may cause alopecia include:

  • Genetic factors : Alopecia tends to run in families.
  • Stress : It is an important precipitating factor in hair loss. A long term chronic stress or a sudden stress (e.g. emotional trauma of a family death or involvement in an accident) may act as trigger for alopecia.
  • Local injury like cuts, scrapes.
  • Infections : Viral and bacterial.
  • Autoimmune disorders like Hashimoto’s thyroiditis, Addison’s disease, leucoderma.
  • Allergy : People suffering from allergic problems like asthma, dermatitis.
  • Nutritional deficiency : Lack of zinc, iron, vitamin B complex in the diet.
  • Chemotherapy and radiation therapy.
  • Hormonal changes as seen in pregnancy, menopause, or in thyroid disorders.
  • Excessive shampooing and blow drying.
  • Prolonged illness like typhoid, tuberculosis, viral hepatitis.
  • Skin diseases like ringworm infection, lichen planus, syphilis.
  • Medications like oral contraceptives, methotrexate, colchicine.
  • Trichotillomania : It is a type of compulsive behavior characterized by pulling and twisting of the hair until it breaks.