<s>[INST] I have a cyst like bump in my elbow that moves and can be painful when it hits a surface. I'm thinking it's some sort of bursitis. According to the sites I've visited ice and rest are suggested. I had something like this similar several years ago but much worse than this time and got medical treatment. Thank you. [/INST] Hello!Thank you for the query.Such cyst like structure is usually a benign soft tissues lesion. It can be filled with fluid or fatty tissue (lipoma). If it is connected with the joint, can give pain and is described as a ganglion.The best way to find out what it is, is an ultrasound of this area. All mentioned type of lumps can be removed and tested under microscope.Please consult a surgeon with it.Hope this will help.Regards. </s>