There are many reasons for hair loss including aging, genetics, hormonal imbalance, and nutritional deficiencies. Although hair loss is not a serious health threat, it may cause negative self image and embarrassment. Most people normally shed around 100 hairs a day as part of the hair renewal process. However some people suffer from excessive hair loss at one time. There are a few types of hair loss: male pattern androgenetic alopecia, female pattern alopecia, telogen effluvium, alopecia areata, alopecia totalis and alopecia universalis. Oral and topical medications are available to treat certain types of alopecia.