Looks like you had bursitis or tendinitis in shoulder joint. Injections are often given for these conditions. At this stage I would suggest to see some orthopaedic surgeon who specialise in shoulder joint because you probably will need MRI to know status of ROTATOR CUFF of your shoulder. Also it’s important to rule out any cervical issues as they usually radiates in arm. Hope you are not diabetic.
Next Steps
You can consult Ortho surgeon specialising in SPORTS MEDICINE at Sawan Neelu Angel Hospital, Saket , New Delhi. If that’s comfortable or else you can consult someone in Banglore