hello and welcome to HCM forum,
i would like to inform you that a lump or a swelling adjacent to a tooth occurs as a result of infection.
Infection may occur following tooth decay
or a periodontal problem, in order to diagnose the exact cause a thorough dental check up is advised, kindly visit a dentist
soon to avoid swelling from spreading to the adjacent tissues.
Thermagel will only relief tooth sensitivity, it does not act on infections,therefore kindly see a dentist.
i hope i answered your dental query,
i wish you good health.