Hair Loss 
Hair loss is caused by a number of factors, including aging, heredity, and, in men, an over-sensitivity of affected hairs to male hormones. Hair loss begins in some people as early as their teens.
According to the American Board of Dermatology, hereditary hair loss affects an estimated 50 million men and 30 million women in the United States. Hair loss can occur in women as early as their 20s, and in men as early as their teens.
Genetic predisposition to hereditary hair loss can be inherited from either side of a person’s family tree or from both parents. Hair loss is found in men and women of most ethnicities and nationalities.
By age forty, 40 percent of women and nearly 40 percent of men have visible signs of hereditary hair loss. By age fifty, 50 percent of both genders show visible signs of hair loss.
Other causes of hair loss include:
Alopecia Areata
Alopecia areata (AA) is recurrent and can cause hair loss in any hair-bearing area. Commonly the condition is evidenced by round or oval bald patches on the scalp or in the eyebrows. The hair will normally grow back within a few months. The condition can progress to loss of all scalp hair (alopecia totalis). The cause of alopecia areata is unknown but commonly thought to be an autoimmune disorder and can be exacerbated by stress or anxiety. The most common treatment is with topical or injected steroids. The prognosis is good if the alopecia areata has been present less than one year. The prognosis is not as good if the disease has been present for longer periods. Hair restoration surgery is not indicated for patients with Alopecia areata. Contact Dr. Parsley if you have questions concerning Alopecia areata.
Traction Alopecia
Traction alopecia is caused by pressure exerted on the hair follicle by tight braiding or cornrow hair styles and commonly occurs along the hairline. Clip-on hairpieces can cause this type of permanent hair loss if the hairpiece is attached in the same location for a long period of time. Trichotillomania is a type of alopecia that results from compulsive pulling and plucking of hairs. Untreated, this condition can result in permanent hair loss in affected areas.
Scarring Alopecia
Scarring alopeccia is hair loss due to scarring and can be attributed to many disorders including injury to the scalp cause by physical trauma, burns, other kinds of surgeries, diseases such as Lupus or shingles, and bacterial infections. Hair replacement surgery can sometimes be indicated in patients with inactive scarring alopecia. If you are suffering from baldness secondary to any of these conditions, contact a dermatologist for a consultation.
Trichotillomania
Trichotillomania refers to habitual, compulsive plucking of hair from the scalp or other hair-bearing areas of the body and, in time, can lead to scarring alopecia. The condition is commonly associated with obsessive-compulsive disorder. Hair loss in affected areas can be transient or permanent, depending upon the severity of the condition. Untreated, the condition can lead to scarring alopecia.
Triangular Alopecia
Triangular alopecia refers to a thinning or complete patch of hair loss at the temples. The medical community does not know the cause of triangular alopecia, but it can be treated successfully with surgery. Triangular alopecia is permanent without treatment.
Telogen Effluvium
Telogen effluvium refers to premature shedding of hair and can be caused by stress, medication, poor nutrition or hormonal problems.
Loose-Anagen Syndrome
Loose-anagen syndrome is a condition seen most often in younger people that is evidenced by excessive hair caught in hair brushes or in the bathtub drain. The condition is caused by hair follicles that are not set firmly enough in the scalp. This condition normally becomes less of a problem as we age.
