 [ Symptoms ] my leg has had spasms for some time now i had total body spasm [ Disease ] well your symptoms certainly warrant a checkup what you are describing could be something as benign non life threatening as a cyst or something more serious the fact you have had pain and swelling in the area plus a fever could point more to an infectious process than to something like cancer but only a physical examination by a medical professional can say for sure and either way this lump seems to need treatment i would suggest you make an appointment with your primary health care provider as soon as possible to get this lump looked at wishing you all the best