The long head of biceps runs beneath the rotaor cuff then down the front of the shoulder where it joins the biceps belly
Biciptial tendinitis is felt in the front of the shoulder. If yoy roll your fingers across the front of the shoulder you can feel the tendon.
Put your elbow at your side and your forearm out in front. Now flex and extend your elbow. Try turning your forearm on its axis (pronation/supination). Pian felyt anteriorly with these actions is often bicipital in nature.
Rotator cuff tendinitis is felt over the outer shoulder and upper arm. Typically it is hard to sleep on the side at night. Place your arm straight by your side and raise it sideways in an arc above your head. If you have pain as the arm goes through horizontal this is typical of rotator cuff pathology. Weakness can mean a cuff tear.
Exercise can help both these conditions (but cannot repair a tear) and Im sure Vickii will have some advice re these.
Remember if in doubt or you are getting worse see a doctor. If it is your right arm beware that cardiac pain can refer to the right shoulder so if you have a cardiac history, any chest tightness or jaw pain call an ambulance!
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