Why did I wake up with sharp pain?

The MRI results closest show some mild desquamation of the joints, which may cause swelling and pain. The swelling in your extensor digitorum brevis muscle could be possibly related to the joint issues. Avoid these movements at first, put ice on them, and try stretches that don't need a lot of force. Besides that, you might notice a difference if you wear supportive shoes. 

Typical signs are swelling, stiffness, or pain during any movement. To get rid of this, apply ice, put the leg up, and take over-the-counter painkillers if needed. It is essential to include strengthening exercises and weight management for health benefits. But, if the symptoms persist or become worse, you should consult an orthopedist for a comprehensive evaluation and individualized advice.

You might have costochondritis. This is when the cartilage in your ribs gets inflamed, which usually causes pain and tenderness. It may be related to weight loss and sometimes comes on after an illness. To help relieve the pain, you can do some gentle stretching, use heat packs, or take over-the-counter painkillers such as ibuprofen.