<unk>  is inflammation of the<unk>  bursa, which lies between the acromion and the head of the humerus leading to extreme pain.
Subacromial bursitis
Retrocalcaneal bursitis
Calcific tendinitis
Olecranon bursitis
Prepatellar bursitis
Iliotibial band syndrome
Tenosynovitis
Achilles tendinitis