Is It Normal for the Area to Be Lumpy After Botox Injection?

Since you didn't mention that you had dermal filler (ex:  Restylane, Juvederm etc) for mouth augmentation, we are assuming that the bumps you are referring to are related to Botox injections to help soften the lines around the mouth area.  Generally, these types of bumps are very short-lived and are related to small areas of inflammation from where the injections sites are.  It is not product as may be the case with fillers.

If this condition doesn't resolve within a day or two, it would be beneficial to have your injector evaluate you for further feedback.

 

Botox can be injected around the mouth to help with lines; the injection can cause some minor swelling for a day and if you get a bruise, this can persist for 3-7 days on average.  Other than that, it should not cause lumpiness.