
It is a chronic autoimmune condition where your immune system mistakenly attacks the healthy lining of your joints (the synovium). Unlike mechanical wear-and-tear, RA causes systemic inflammation that can lead to bone erosion and joint deformity if not managed,When RA affects the shoulder, it often causes Shoulder Impingement or Scapulohumeral Dysfunction because persistent inflammation weakens the rotator cuff tendons and alters how your shoulder blade moves.Managing Flares (Acute Phase) :Relative Rest,Isometric Exercises,Avoid Stretching,Maintenance (Chronic Inactive Phase):Gentle Range of Motion,Scapular Setting,Low-Impact Aerobics,The 2-Hour Rule,Warmth & Cold,Listen to Pain.