Finasteride inhibits an enzyme that converts testosterone to DHT, or dihydrotestosterone, the hormone that causes hair loss in men, and unlike minoxidil, this drug can actually help hair grow back, as well as prevent further loss. All you have to do is take one pill a day, and according to Dr. Evan Rieder, dermatologist in the Ronald O. Perelman Department of Dermatology at NYU Langone Health, two-thirds of men taking this treatment will see improvements in hair density over time.
The Rogaine rep we spoke to explained that the different packaging (and therefore different prices) has to do with the FDA-approval process: “We discovered in clinical trials that the hair loss patterns between men and women are different,” she said by way of explanation. “Men typically have that bald spot on the crown of their head, where women generally have a general thinning throughout, but concentrated more on the top of the head. So for FDA approval, we had to come up with two different, gender-specific products, so the directions were more explanatory.” 

Some hair loss can also result from the psychological condition trichotillomania. “People with this condition compulsively pull out their hair when they are stressed or even when they are concentrating, e.g. studying hard,” says Burg. “Sometimes the individual doesn’t know they are pulling their hair out, doing the activity absent-mindedly, and only notice once the bald patches appear.” Over time the hair follicles can become so damaged that they die and leave permanent bald patches. Find out why you shouldn’t pull out gray hairs either.

Hello..... Hello....Hormonal changes and imbalances can cause temporary hair loss.....Scalp infections. Infections, such as ringworm, can invade the hair and skin of your scalp, leading to scaly patches and hair loss. Once infections are treated, hair generally grows back..  Hair loss can be caused by drugs used for cancer, arthritis, depression, heart problems, high blood pressure and birth control. Intake of too much vitamin A may cause hair loss as well. The most common cause of hair loss is a hereditary condition, in this case both hair thinning and hair fall can occur ... Consult dermatologist .
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Contact immunotherapy. Another drug that can be administered for cases of alopecia areata is contact immunotherapy and is recommended for severe cases. Diphenylcyclopropenon (DPCP) is applied on the scalp every week, and the dosage of the drug is increased over time until a mild allergic reaction is observed, which signals that the drug is taking effect. Regrowth may be observed within three months from the beginning of treatment.
Choosing where and who will perform your hair transplant is as important a consideration as to what kind of hair transplant to get. Of utmost consideration is that this should be done by the dermatologist /surgeon, and not his/her technician. The surgeon himself/herself should also oversee the design of your hairline and how the extraction of the graft will be done.
Tinea is the medical word for fungal infection, and capitis means head. Tinea capitis is fungal infection of the scalp that for the most part affects school-age children. Tinea capitis is more common in black African or African-American scalps. This condition is rare in healthy adults. Bald spots usually show broken-off hairs accompanied by a dermatitis. Oral antifungals can penetrate the hair roots and cure the infection, after which hair grows back. Sharing hats or combs and brushes may transmit tinea capitis. 
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