Hello, my name is Dr.Dorina Gurabardhi. I understand your concern.
Trauma to the mouth (such as lip or
cheek biting) is the most common cause of a lump.
Some advices that I can give to you are :
-Avoid irritation and prevent infection.
-Do not squeeze, scratch, or pick at the lump. Do not stick a needle in it.
-Leave the lump exposed to the air whenever possible.
-Apply warm, wet cloths to the painful lump for 20 to 30 minutes, 3 or 4 times a day. If you prefer, you can also use a hot water bottle over a damp towel. The heat and moisture can soothe the lump, increase blood circulation to the area, and speed healing. It can also bring a lump caused by infection to a head (but it may take 5 to 7 days). Be careful not to burn your skin. Do not use water that is warmer than bathwater.
Hope my answer was helpful, if you have any other questions I'll be glad to help, thanks!