question: Hello. My 8 year old son hit his outter thigh on the corner of my end table rather hard after falling off my bed. Initially, there was mearly a scrap with a tiny bit of discolouration around the wound. About 1.5 hours after the accident, the area swelled about the diamiter of a tennis ball and half the height off his leg. Bruising has reach the top of the skin. My concern is the size of the lump. Should I seek medical attention for him?