<s>[INST] I was swing dancing a week ago, with alot of spinning, pulling and quick movement. That night, a large pea size lump and swelling showed up in forearm in muscle about 3 inches from elbow joint (towards wrist ). Bruising developed in next few days along with an ache towards hand after weeding yard. Today, a week later, greenish bruising is showing on both sides of the elbow joint, and an ache not going away, and tingling in the hand, palm, pinky and ring fingers. Bump is painful and throbbing. Shooting pain towards hand when leaning on elbow while getting up from laying down. What did I do? Should I get it checked? [/INST] Hi, this appears to be a muscle tear of the flexor group caused by your dancing activities. The swelling is from a blood collection. A stretched nerve running down to the hand along the side of the injury can cause tingling and pain.] You need to rest the limb in a sling with a pressure bandage for the elbow down to the hand. Apply ice and take Ibuprofen or diclofenac for pain. Once pain free start stretching exercises </s>