The swelling may be because of an infection in any of the teeth present at the back/ molars..Wisdom tooth eruption even creates the radiating pain towards head..Visit a dentist to get the area examined and the x ray and clinical images can get better hold for the further treatment..Age of the child matters for diagnosing the eruption of wisdom tooth..Take an anti inflammatory for the time being.
Answered2019-02-19 11:38:53
Let others know if this answer was helpful