What medical & health conditions cause hair loss

In addition to male pattern baldness, excessive HAIR FALL could also result from: alopecia areata or other medical conditions, crash dieting, damaging hair care practice, hormonal changes or thyroid abnormalities, serious illness, and severe emotional stress. Read discussion on MEN'S HEALTH & HAIR LOSS or WOMEN HEALTH & HAIR LOSS for more in-depth information।
According to doctors research, the following causes are attributed to hair loss in man and woman:
Androgens and estrogens imbalance may cause baldness thinning hair in women.
Hormone glands over or under activity may cause hair loss such as in Thyroid disease.
The use of steroids may accelerate the effects of testosterone on men's baldness.
Medication may contribute to the question of "hair loss, why me?"
Disease may cause hair loss such as scalp disease or as a by product of a disease such as or ovarian tumors or auto immune disease such as Lupus.
Hair loss due to trauma, physical or emotional including surgical procedures burns, scarring from accidents and severe emotional stress. Telogen effluvium is a common condition where hair loss is sudden, usually traced to some sort of stress on your system. In most cases it is a temporary telogen effluvium, where hair will grow back after the stress subsides.
Improper hair care is a factor in hair lost.
Severe weight loss due to crash dieting, bulimia, protein deficiency, essential fatty acid or zinc deficiency, low levels of iron and the amino acid L-lysine may effect hair loss.