Any attempted movement is extremely painful. A dislocated shoulder may cause damage to the nerves around the shoulder joint. If the nerves have been stretched, usually there will be a patch of numbness on the outside of the arm just below the point of the shoulder. Several of the muscles around the shoulder may be slightly weak until the nerve recovers. This is usually temporary.
Chronic instability causes several symptoms.
The shoulder may slip, or sublux, when in certain positions. One of the common positions is with the hand raised above the head in a throwing motion. Subluxation of the shoulder usually causes a quick feeling of pain, like something is slipping, or pinching, in the shoulder. This creates a situation where you can't trust the shoulder and may feel anxious in situations that require you to use the shoulder in the position. The shoulder may become so loose that it dislocates frequently.