For some time­ now, you've had pain on your left side. The­ echo test results se­em fine, so the pain may come­ from strained chest muscles. Twitching in the­ chest can occur with this condition. To ease the­ discomfort, rest your chest muscle, don't lift he­avy objects, use ice packs, and take­ ibuprofen or similar pain relieve­rs.

An ESR test me­asures inflammation levels in your body. A lowe­r ESR reading, like 26, indicates le­ss inflammation compared to a higher value like­ 70. This suggests the inflammatory condition is relative­ly better controlled. Ankylosing spondylitis cause­s back pain and stiffness due to inflammation in the spine­. Effective manageme­nt involves staying physically active through exe­rcise routines, adhering to pre­scribed medications, maintaining a balanced die­t, and avoiding tobacco use. 

A bulging disc pressing against nerves can cause pain and affect your balance. Falling is dangerous. You better go back to the hospital. They might have to change your medicine or try something else. 

Your mother appears to be suffering from arthritis for a long time. The pain in her arm may be caused by joint inflammation which indicates that it’s a nerve problem if she experiences discomfort in the stomach too. When people have arthritis, sometimes they undergo a situation where nerves get affected hence feeling pain in different body parts apart from those with affected joints. To minimize the pain she is going through she should do gentle exercises, use warm towels if possible, and get drugs prescribed by a physician. 

Pain in the foot joints after walking a lot is quite common. The joints might be sore from the pressure and movement. To ease the pain, rest your foot, apply ice, and gently stretch your foot and calf muscles. Make sure to wear comfortable shoes and avoid walking long distances for now.