Deltoid pain typically develops due to injury to the muscle or nearby structures. This may include a muscle strain, nerve injury, or problems your rotator cuff, among others. A deltoid muscle ...

Pain in the right shoulder and arm can occur due to injury, wear and tear, and other health conditions. You may experience other symptoms with certain causes. Shoulder pain is very common.

A pinched nerve is exactly what it sounds like. A nerve is being pressured by surrounding tissue and thus, loses some circulation. This pressure can be caused by the surrounding muscles, cartilage, or ...

Optic neuritis (ON) is an inflammation that damages your optic nerve. It can cause vision loss and pain when you move your eyes. As the inflammation goes away, your symptoms usually get better.