How long after injections can Botox leak from the injection site?

There’s absolutely no possibility of Botox leaking from the injection site. The needles we use are extremely thin which is another reason that your Botox treatment will not cause any leakage

Sometimes during a botox injection, some of the liquid botox or perhaps blood can be felt running along the area of injection. We are not aware however of Botox leaking from the injection sites since the needle holes are very small with a 30 gauge needle. Hope this helps! Dr Joseph

Botox is injected into the muscle and will not leak from the injection site. By the time you leave the office from your treatment, leaking from the injection site is not a concern. Final results from your treatment will be seen within two weeks.

It is extremely rare for Botox to run out of an injections site other than the first second it is injected. The needles used are extremely thin/small (generally 30-33 gauge).