Is that the vaccine injection site? If so it's normal to have a lump there, you don't have to do anything about it. If there's some pus or it looks inflamed then you can check with doctor
sometimes nothing to worry, but at times may need surgery..incision and drainage..so, better to visit doctor asap
Don't squeeze the boil. Get treatments to get rid of bacteria on the skin.
I'll monitor and bring to doctor if it does not go off
Check with doctor!
Anonymous