You will probably feel a pain in the front of your shoulder which is immediately followed by a popping feeling. Your biceps muscle will then seem deformed, as its ‘belly’ will move towards your elbow whenever you flex it. This is the so-called ‘Popeye’ sign!
The pain should settle quite quickly, and with many patients especially older ones there is no problem apart from the deformity. Younger patients may feel aches and pains in the upper arm, especially when they flex their elbow.