My back ( near shoulder down) small area getting...

What is the appropriate treatment ?
First of all, it's recommended to visit the specialist doctor for assessment of your condition then treat it accordingly. As there are many causes for your symptoms and the treatment depends on the cause. If the source of your shoulder pain is a pinched nerve, your doctor may recommend physical therapy to improve strength and flexibility in your neck and shoulder, limit the movement of your neck with traction or a soft collar worn around the neck for short periods of time. Other treatments may include anti-inflammatory pain relievers or injections of steroids in the area of the affected nerve. If the problem is severe enough, surgery may be an option to remove the bone spur pinching the nerve.

Diagnosis:
Medical history taking and clinical examination of your condition by the orthopedic. Some investigations can be done such as complete blood count to check for infection, shoulder-neck and upper back X-ray as well as MRI if needed.

The possible causes:
Pinched nerve
Rotator cuff damage
Bursitits
Arthritis
Dislocated shoulder
Fracture
Others

Recommendation:
It's recommended to see orthopedic doctor for further assessment and management.