Thyroid disease Hair loss can be cause due to both an overactive thyroid and an under active thyroid. Thyroid disease can be diagnosed. Hair loss associated with thyroid disease can be reversed with proper treatment.
Deficient diet some people who go severely abnormal eating habits, on low protein diets, or may have develop protein malnutrition. It results in massive amounts of hair shedding can occur two to three months later. A sign of this is if the hair can be pulled out by the roots fairly easily. This condition can be reversed and prevented by eating the proper amount of protein
Medications some drugs may cause temporary hair shedding in a small percentage of people. some of the medicines used for the following: gout, arthritis, depression, heart problems, high blood pressure, or blood thinner. High doses of vitamin A may also cause hair shedding.
Cancer treatments Hairs become thin and break off as they exit the scalp due to Chemotherapy and radiation treatment, because it stops hair cells from dividing. Patients can lose up to 90 percent of their scalp hair; this occurs one to three weeks after the treatment. There are some drugs in development to help prevent this hair loss from occurring.
Low serum iron some people don't have enough iron in their diets or may not fully absorb iron in their diets. Due to Iron deficiency occasionally produces hair loss. By taking iron pills it can be corrected.