What is a common side effect of using Botox?

Temporary swelling or bruising at the injection site is a common side effect of using Botox. When Botox is injected into the skin, it can cause minor trauma to the surrounding tissues, which may result in temporary swelling or bruising. This is generally mild and resolves on its own within a few days. The occurrence of swelling or bruising is quite common after any type of injection and often lessens the more experienced the practitioner is at administering the treatment.

Other options, while potentially relevant in a broader context of cosmetic procedures or medical treatments, are not typical side effects of Botox. Persistent redness and irritation may occur but are not as common as swelling or bruising. Severe allergic reactions, while possible with any injectable substance, are very rare with Botox. Excessive hair growth is unrelated to Botox's mechanism or purpose, as Botox is a neuromodulator used primarily for reducing the appearance of wrinkles by temporarily paralyzing muscles.