Some hair loss treatments can cause side effects. Regaine for women can cause headache, skin irritation and changes in the colour or texture of your hair. It is normal to notice increased shedding during the first two weeks of treatment with Regaine. This indicates that the treatment is working. If you find that you are shedding an unusual amount of hair after the first 14 days of treatment, stop using Regaine and ask your doctor for advice.
The only nonchemical option offered up by the dermatologists I spoke with — short of a surgical hair transplant or platelet-rich plasma therapy, which is like Kim Kardashian’s vampire facial but for your scalp — was the laser comb. First cleared by the FDA in 2009, the HairMax LaserComb is a handheld laser device that is designed to promote hair growth. As the manufacturer explains in a letter to the FDA, “The device provides distributed laser light to the scalp while the comb teeth simultaneously part the user’s hair to ensure the laser light reaches the user’s scalp,” which, in turn, stimulates the hair follicles.
Cyproterone acetate was also developed in the 1960s. It blocks the effect of androgen hormones and is an alternative to spironolactone for women with patterned hair loss. It is a weak progestogen and is found in some oral contraceptives (the pill). Cyproterone acetate can also be used to treat acne, unwanted facial and body hair, and hereditary hair loss in women. Cyproterone acetate requires a prescription from your doctor.
Egg mask. Eggs are one of the riches sources of protein, which is the building block of keratin, as well as other minerals like zinc, iron, selenium, phosphorous and iodine. Mix an egg white with a tablespoon of olive oil and honey to make a paste. Apply it on your hair and leave on for 20 minutes. Rinse and shampoo using cold water. You can apply this egg mask on your hair once a week.
Female-pattern hair loss, called androgenic or androgenetic alopecia, is basically the female version of male pattern baldness. “If you come from a family where women started to have hair loss at a certain age, then you might be more prone to it,” says Dr. Glashofer. Unlike men, women don't tend to have a receding hairline, instead their part may widen and they may have noticeable thinning of hair.
Finasteride, also known as the brand name Propecia, is a pill that is FDA approved to prevent hair loss. But don’t confuse this for being a miracle cure for baldness. There’s no such thing as a magical cure that stops male pattern baldness. However, finasteride can be an effective way to prevent your hair from thinning because it prohibits the conversion of testosterone into DHT (dihydrotestosterone). DHT is a powerful hormone that causes hair follicles to miniaturize and eventually stop growing hair. You get this benefit as long as you take it properly and consistently as prescribed by your doctor.
Any kind of physical trauma—surgery, a car accident, or a severe illness, even the flu—can cause temporary hair loss. This can trigger a type of hair loss called telogen effluvium. Hair has a programmed life cycle: a growth phase, rest phase and shedding phase. “When you have a really stressful event, it can shock the hair cycle, (pushing) more hair into the shedding phase,” explains Marc Glashofer, MD, a dermatologist in New York City. Hair loss often becomes noticeable three-to-six months after the trauma.
Why? Unwanted hair growth (sideburns, for example) is a reported side effect of minoxidil. The belief is that a higher concentration of minoxidil would result in more unwanted hair, which is why women are instructed to use it less often. However, the study in Skin Therapy Letter reports that unwanted hair was more common in 2 percent minoxidil solutions than 5 percent, and women are instructed to use Rogaine’s 2 percent solution twice daily — so what gives? 

For those concerned that the existing treatments lack a certain sci-fi quality, behold the Laser Comb. The Laser Comb recently became only the third hair loss treatment to receive FDA approval. And it is the first that doesn’t use drugs or surgery. By stimulating follicles with a low-level laser, the hand-held device was shown in test trials to increase hair volume in a majority of patients.
Female-pattern hair loss, called androgenic or androgenetic alopecia, is basically the female version of male pattern baldness. “If you come from a family where women started to have hair loss at a certain age, then you might be more prone to it,” says Dr. Glashofer. Unlike men, women don't tend to have a receding hairline, instead their part may widen and they may have noticeable thinning of hair.
Pregnancy may cause many changes in the scalp hair. As the hormones fluctuate during pregnancy, a large number of women feel their hair thickens and becomes fuller. This may be related to change in the number of hairs cycling in the growth phase of hair growth, but the exact reason is unknown. Quite often, there may be a loss of hair (telogen effluvium) after delivery or a few months later which will eventually normalize.
A common skin condition, alopecia areata usually starts as a single quarter-sized circle of perfectly smooth bald skin. These patches usually regrow in three to six months without treatment. Sometimes, white hair temporarily regrows and then becomes dark. The most extensive form is alopecia totalis, in which the entire scalp goes bald. It's important to emphasize that patients who have localized hair loss generally don't go on to lose hair all over the scalp. Alopecia areata can affect hair on other parts of the body, too (for example, the beard or eyebrows).
3. Surgical hair replacement. If you opt for hair transplantation (which runs $5,000 and up), your dermatologist or hair-replacement surgeon will remove single hair follicles from the back of the head, near the nape of the neck, where your hair is fullest. Once those follicles are harvested, they are then dissected and reimplanted into an area of the scalp where hair is thinning. The procedure takes anywhere from three to six hours, and newly implanted hair will usually begin to grow on its own 3 to 12 months after the treatment session. Traditionally, hair transplantation required removal of an entire strip of scalp, Sadick says, but this new follicle-by-follicle technique looks more natural when it heals and allows patients to get heads of hair as dense-looking as before they started losing it.
Natural hair that is subjected to constant physical trauma from excessive brushing or combing, tight braids or ponytails, or extreme scratching or massage can cause hair at the temples to become weak and to stop growing to its normal length. Clean shaving, especially for men, can cause white bumps to appear on the area where the hair was shaved short, and at times can become infected with pus and leave permanent scarring, affecting hair growth.
Harklinikken does not advertise, but the 25-year-old multinational company is beginning an aggressive expansion into the $3.6 billion hair-loss market in the United States, meaning you’re likely to hear a lot more about it. A New York clinic opened in June inside the Core Club in Midtown (you don’t need to be a member to get an appointment); and in August, Harklinikken consultations became available at some 70 Women’s Care Florida obstetrics and gynecology clinics. (Roughly 75 percent of the company’s 50,000 active users are female.) 
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