Greetings! friend, as per my insight, pain itself is a disease and also a sign of the body expressing that: Pay attention because there’s a problem here. I have read your post, and it's quite interesting. Like you say, pain can also be a symptom of other illnesses. In this post, I read that your leg was hit by a stone. I think you are okay now. Take the necessary medicines, and take care of yourself for the rest of the time. I wish you great success and the best of luck.