Androgenetic Alopecia

• Example of androgenetic alopecia
  
  Androgenetic alopecia is a type of hair loss that results in baldness in men and women. The time of hair growth takes longer than average and when you have androgenetic alopecia, the hair that grows back is not as strong or thick. The hair isn't as rooted into the scalp as it usually would be, making it more susceptible to falling out. According to the Mayo Clinic, androgenetic alopecia is most likely hereditary. If you have a family member who has developed androgenetic alopecia, your chances of developing the condition increase.
  
  

Cicatricial Alopecia

• Cicatricial alopecia is permanent hair loss that results from damage to the hair follicles. If the hair follicles become inflamed or scarred, new hair is unable to regrow. The reasons for this condition are unknown. People who suffer from this condition usually have lupus or lichen planus (a type of inflammatory skin disease).
  
  

Alopecia Areata

• Example of Alopecia Areata
  
  People who have alopecia areata lose their hair multiple times. The hair will grow back, but the cycle of hair growth and loss is continual. According to the Mayo Clinic, it is believed that those who suffer from alopecia areata have a genetic predisposition. Once a person with alopecia areata becomes exposed to a virus, the virus will trigger the condition, resulting in hair loss. Heredity can also be a factor.
  
  

Telogen Effluvium

• Telogen effluvium occurs as a result of a change in your normal hair growth cycle. Emotional causes such as stress can trigger a response in your hair roots. The hair will then fall out. Typically new hair growth will occur. Telogen effluvium can even happen after a high fever or surgery, during weight loss, or because of shifts in your metabolism. It may take months for hair to regrow if you suffer from telogen effluvium.
  
  

Other Causes

• A condition known as traction alopecia is the result of excessive hairstyling or wearing tight hairstyles. Traction alopecia can result in permanent hair loss if there is damage to the hair root. Inadequate protein or iron, medications such as birth control, and medical conditions such as diabetes can also cause hair loss. Other causes of hair loss may be chemotherapy, hormonal changes in your body such as menopause or pregnancy, or scalp infections like ringworm. Excessive hair dyeing or other hair treatments can cause hair loss as well.