Hello there... I understand your concern... There are many possible reasons for your pain which has to be taken care....it may be due to Abnormalities in the bone or joints,trauma,poor posture,degenerative diseases,muscle strain,shoulder joint instability,dislocation...you may require investigations like x ray,MRI etc...Consult nearest orthopedic surgeon they will do the needful...for sinusitis Drink plenty of fluids, such as water or juice. This will help dilute mucous secretions and promote drainage. Avoid beverages that contain caffeine or alcohol, as they can be dehydrating. Drinking alcohol can also worsen the swelling of the lining of the sinuses and nose.