The best treatment for shoulder tendinitis ultimately depends on the severity of the injury. Utilizing nonsteroidal anti-inflammatory medications coupled with avoiding further injury is the best way to treat minor cases of shoulder tendinitis, according to Johns Hopkins Medicine.
Rest, ice and support are the keys to treating shoulder tendinitis in it's early stage, notes PhysioWorks. While treatment plans for shoulder tendinitis pain vary, using heat to the injury, strengthening exercises, ultrasound therapy, corticosteroid injections and even surgery are other treatment options depending on the severity of the injury. It's best to consult a doctor to determine the cause of tendinitis, such as rotator cuff problems or bursitis, in order to determine the best treatment.