Suggest Remedy For Swelling On Forehead After Injury

Hi... My baby has swelling on his forehead after he hit our staircase.. He s acting normal byt the problem is he keeps on hitting his forehead accidentally.. Either he falls in the floor or get bumped into something.. Same area is affected.. And its almost a month bump is not healing.. But still my 1 yr old baby ia acting normal.. This time he hit his head again and the bump becomes bigger ..like a chickens egg siZe with blue and brown discoloration on skin... Just worried.. Anything i can do ti reduce swelling and discoloration aside applying ice?