Wrinkles and frown line
Years of squinting and frowning can leave deep wrinkles that form between the eyebrows and may extend to the bridge of the nose. Wrinkles and frown lines also may appear across the forehead and at the corners of the eyes ("crow's feet") Dermatologists can quickly and safely inject botulinum toxin during an office visit to diminish these wrinkles and lines that create, an angry or sad look and detract from a pleasant facial appearance
What is botulinum toxin?
Botulinm toxin type A and botulinum toxin type B are purified substances, derived from a bacteria, that block muscular nerve signals. Injecting very small amounts into specific facial muscles blocks the muscle's impulse. This temporarily weakens the muscle and diminishes the unwanted lines. Botulinum toxin has been used since 1980 to treat many muscle disorders such as lazy eye and uncontrolled blinking. It was pioneered by dermatologic surgeons for cosmetic use in 1987. Botulinum toxin type A is specifically indicated for the lines between the eyebrows, and it also can be effectively used for "off-lable"
Indications in other facial areas.
Once the muscle is weakened and relaxed, it cannot contract. Since there is no way to make the undesirable facial expression, the lines gradually smooth out from disuse, and new creases are prevented from forming. Other muscles such as those needed to raise the eyebrows are not affected, so a natural expression is maintained. For optimal results, botulinum toxin therapy may be used in combination with other cosmetic skin procedures such as chemical peels, laser resurfacing, and dermal fillers. Combination therapy also can help prevent the formation of new lines and wrinkles. Botulinum toxin is less useful for the smile lines around the mouth because muscle action in this area is needed for important functions such as eating and talking.
Botulinum Toxin Therapy
Before treatment, the dermatologist obtains the patient's medical history, including any medications taken. Treatment involves injecting very small amounts of botulinum toxin directly into the underlying facial muscles to relax them. A tiny needle is used; the procedure is well tolerated and takes just a few minutes with no "down time" or procedure recovery period. Botulinum toxin takes effect about 3 to 7 days after treatment. The improvement generally lasts about 8 to 10 months; the effect gradually fades as muscle action returns. Patients require re-injection at various intervals.With repeated treatments, atrophy (thinning) of the muscle may occur. This usually produces longer-lasting results.

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