Muscles of the neck and shoulder may get strained due to prolonged stress in the area. You need to relax the area by slow movements and bring the muscle out of the overcontracted state.
Based on the location of the shoulder pain, the corresponding muscles, whether overstrained or overstretched, could be treated accordingly.
Deltoids
Trapezius
Rotator cuff muscles
Levator scapulae
Erector Spinae (iliocostalis, longissimus, spinalis): Run along the spine; extend and stabilize the vertebral column.
Multifidus: Deep spinal stabilizer, helps control segmental extension.
Quadratus Lumborum: Supports lumbar extension
Strains can happen gradually from repetitive movement or suddenly from overexertion. You may notice them if you return to activities after a period of inactivity—without gradually building up strength and endurance.
Inflammation (swelling) usually happens when your immune system sends cells to fight infections or heal an injury. Health conditions can make your immune system go into overdrive. This can lead to inflammation causing more problems than it helps. Steroids make your body slow down the production of the chemicals that cause inflammation.
Corticosteroids (also known as glucocorticoids, cortisone, or steroids) are powerful anti-inflammatory drugs that can cause bones to weaken and become prone to fracture.
They stimulate the activity of osteoclasts (which are bone-absorbing cells).
They prevent the formation of osteoblasts (which are bone-building cells).
They interfere with the small intestine’s ability to absorb calcium. Corticosteroids can prevent the small intestine from absorbing the calcium your body needs, and the calcium that’s not absorbed is excreted in your urine. When your body isn’t absorbing calcium from the small intestine, it takes calcium away from your bones. Calcium is an essential nutrient for bone health.