### Patient: Doctor, I have been experiencing some numbness and tingling in my right elbow and also noticed a lump there, what could be the reason behind it?
### Doctor: It seems like you have lateral epicondylitis, also known as tennis elbow. The numbness and tingling could be due to paresthesia, which is a common symptom of this condition. The lump or mass is caused by inflammation of the tendons in your elbow, and it can be quite painful.