Hi..
Can understand your concern..
As per your complain swelling and bruising of gums after
injury can happen due to inflammation caused due to injury..
It may also be due to
internal bleeding due to rupture of blood vessels causing bruising and lump formation..
It may also be associated with
fracture of the jaw bone if there is difficulty in opening and closing of mouth and pain .
I would suggest you to take your son to a
dentist to get him ruled out for the cause of him signs and symptoms..
The dentist will take desired x rays and clinical examination to give correct diagnosis and treatment can be planned..
Till the time you can give him
cold packs by wrapping ice in a cloth and placing intermittently over the affected area..
In case of pain painkiller in child doses can be given..
But you should visit a dentist soon..
Hope your query is solved..
Thanks and regards..
Dr.Honey Nandwani Arora.