Consult your dentist at the earliest

If you put picture here then it will be more comfortable for me to tell you. Kindly dont apply any home remedies there. Dont apply Balm, vicks or iodex. Only apply ice pack (wrap ice in cloth) and put it there for external application at the area of tooth pain. Apply ice pack for 10 to 15 minutes each time for 3 to 4 times in a day  Dont give him spicy and hot food. Give him/her only soft diet. And consult your dentist. There might be eruption pain.

Dear practo user Without any cavity, this could be pain or discomfort due to tooth eruption. Just do gum massage with gumtone powder over the area.

A snap of that area will be even more helpful Avoid hot compression/balm ointments application extraorally Avoid sweet sticky very hot or cold intake. Brush after every liquid or solid food intake.

A picture attached would help. I suggest you consult on practo teleconsultation platform to help you with further instructions