Common causes of hair loss
Male pattern baldness
Trauma
Chemicals
Medications such as allopurinol (Zyloprim) and warfarin (Coumadin)
Poor nutrition
Stress, for example, during a major illness
Uncommon causes of alopecia
Poor blood flow
Infections such as syphilis
Skin diseases such as lupus
Cancers
Hormone problems
Kidney failure
Liver failure
