What Causes Headaches And Night Sweats?

hi im worried about my son he is 7 years old and for the last 5-6 monthe has been suffering with headaches they can happen suddnly and i havnt detected a pattern they are similar to migrains he also has started to suffr with night sweats today he had a headache which he said was mostly on left side of forehead where he says it feels like theres alump inside iv taken a god look this side does seem slightly more protruding then the rother side when pressed he says it hurts also theres a round blue outlined mark there please advise