There are many medical reasons why you may experience hair loss. Fortunately, when you lose your hair after an illness or surgery, the condition is usually temporary or can be reversed.

Surgery and hair loss

About 3-4 months after a major surgery or illness, you may be shocked when a bunch of your hair falls out. You may notice more hair on your pillow, in your hair brush or comb, or in the shower drain. Don’t worry, this is a common occurrence. The hair loss is related to the stress of the surgery, and should be temporary. Hair loss from surgery usually causes thinning of the hair, but not balding.

A high fever can also cause hair loss. The fever causes the cells in your hair to shut down, prompting your hair to go into the resting phase and fall out. Your hair should grow back.

Medication and hair loss

If your hair is falling out after surgery, your medicine may also be the culprit. Talk to your doctor if you are taking…

• Anticoagulants
• Antidepressants
• Birth control
• Amphetamines
• Beta-blockers
• Lithium

Hair loss caused by these medications will usually stop when you stop using the drug. Hair loss can also be caused by taking too much vitamin A. Sometimes the foods you are eating can also cause hair loss.

Chemotherapy and hair loss

Hair loss is a common side effect of chemotherapy. Chemotherapy-related hair loss is different because it can result in hair loss in different parts of the body such as:

• Scalp
• Pubic area
• Underarms
• Face

Chemotherapy can cause your hair to thin, or you may go completely bald. Hair loss from chemotherapy is usually temporary, and your hair should grow back after 6-8 weeks from the end of your treatment.

Pregnancy and hair loss

It is also common for women to experience hair loss about 3-6 months after pregnancy. When you are pregnant, the high levels of estrogen in your body cause your scalp to hold on to hairs that would normally fall out on their own. After you give birth, your hormones drop down to normal levels and the hairs fall out, and your hair goes back to its normal growth cycle.

In this case, hair loss is good because it demonstrates that your hormones are returning to normal levels.

Fungal infections and hair loss

Tinea capitis is a fungal infection on your scalp. It often causes hair loss in children. When you have Tinea capitis, your scalp becomes scaly and flaky, and your hair breaks at the surface of your scalp. The hair is usually lost in patches.

Your hormones and hair loss

Hair loss is sometimes caused by hormonal problems. Your hair might fall out if you are having problems with an overactive or under active thyroid gland. You may also experience hair loss if your sex hormones, estrogen and androgen, get out of balance. Correcting your hormone imbalance should stop your hair loss.

Find a natural solution for hair loss here.

Sources:
http://familydoctor.org/online/famdocen/home/men/general/081.html
http://www.docshop.com/education/dermatology/hair-loss/causes/
http://www.intelihealth.com/IH/ihtIH/WSIHW000/9339/31039.html