Botox injection can be performed in an examination room environment. The number of injections depends on the amount of area being treated. Because of the use of a micro-needle and extremely small amounts of liquid, and stinging sensation is minimal and subsides quickly. Ice compresses may also be used before and after treatment to minimize discomfort.
Side effects of Botox injection are minimal. Because the protein does not affect the nerves, there is no numbness in the area of the injections and muscles related to other facial expressions are rarely affected.
One or two patients in every hundred may experience a temporary drooping in the eyelid but this usually goes away in a week or two. Slight bruising can also occur around the injection sites, which can usually be covered with make-up. Some patients may also experience a mild headache for a while.
The effects of the initial injections are not seen for three or four days and will not be complete for about two weeks. Repeat injections may be recommended every three or four months during the firs year to keep the muscles blocked and allow the skin to smooth out.
After the first set of treatments you will need to return only when you notice a return in muscle movement, which may not occur for 7 months or more. As these muscles are inactive over time, patients are often broken of the bad frowning habits, which further prolongs the effect.