Botox is a purified protein which relaxes the muscles to which it is applied. This relaxation

lasts between 4 and 6 months, and then the treated muscles gradually return to their original condition.

As muscles do not temporarily act, the wrinkles diminish  or  fade away.Not all facial wrinkles are related only to activity of underlying muscles. Front, frown lines and crows feet wrinkles are  enhanced with botox injection.Besides cosmetic purpose also can be used in conjunction with hyperhydrosis treatment for hands, underarm and feet. It works after 3-7 days and lasts up to 4-6 months.According to case, the repetition is required on a specific periods.It does not require anesthesia.

There have been no long term side effects, health hazards related to Botox reported so far.It has FDA approval  and commonly used for cosmetic purpose by  plastic surgeons and  dermatologists.

Related to injection redness,swelling and bruising are uncommon.Avoid strenous exercise and massage on the area.Also, pregnancy or nursery has to be avoided to prevent side effects.