The human body has a sophisticated warning system for pain, with symptoms such as headaches, stomachaches, and bone and joint pain often indicating abnormalities. Pain and weakness in the arms and legs can signal more serious neurological diseases such as brain tumors. These tumors can cause a range of symptoms, including vomiting, nausea, numbness, weakness on one side of the body, difficulty speaking, walking difficulties, swallowing issues, vision problems, hearing loss, balance issues, facial muscle weakness