The majority of people shed 50 to 100 strands of hair daily. However, with about 100,000 strands of hair, the loss of a few strands is likely to go unnoticed. As people grow older, hair tends to thin gradually. Hair loss appears in different ways, depending with the cause. It can appear gradually or suddenly and affect the whole body or just the scalp. Some forms of loss are permanent, while others are temporary. The signs of hair loss are gradual thinning on the scalp, patchy or circular bald spots, sudden loose hair and full-body loss. If you notice patchy or sudden or unusual loss when washing or combing your hair, it is advisable to see your doctor. The sudden loss of hair could be a signal of an underlying medical problem that requires immediate treatment. The main causes of hair loss include:
· Hormonal factors
A common cause of hair loss is the hereditary conditions often referred to as female-pattern baldness or male-pattern baldness. People who are genetically susceptible can have certain sex hormones that trigger a certain pattern of the loss. This is particularly common in men who experience permanent thinning, which begins at puberty. Furthermore, hormonal imbalances and changes, as a result of pregnancy, discontinuation of the birth control pills, childbirth or disorder of menopause can cause temporary hair loss.
· Medical conditions
Several medical problems, such as thyroid problems, scalp infection, alopecia areata and other skin disorders cause the loss. Thyroid glands help to regulate the levels of hormones in the body. Therefore, when you have thyroid problems so that the gland is not working right, the loss may occur. Scalp infections, such as ringworms on the skin of the scalp, can also result in the loss of hair. Once the infection is treated, hair grows back. Alopecia areata is a disease that occurs when the immune system in the body attacks hair follicles. The end result is smooth, round patches on the scalp. Other skin disorders such as lupus and lichen planus can result in the permanent loss of hair, where scars occur.
· Emotional / physical causes
Many people experience the loss as a result of emotional or physical shock. For example, an excess or sudden weight loss, death of a loved one or a high fever can result in general thinning for several months. Furthermore, pulling disorders cause patients to have an irresistible desire to pull out some of their scalp, eyes or other areas. Hair-pulling often leaves bald patches on the head. Moreover, certain hairstyles such as cornrows or pigtails can result in traction loss.
Many of the drugs administrated to treat cancer, high blood pressure; heart problems, arthritis and depression cause hair loss.