Why does shoulder osteoarthritis cause shoulder pain?

Shoulder osteoarthritis involves gradual change in the joint surfaces, including thinning or uneven cartilage and changes in the underlying bone. The joint may move less freely, while the capsule and nearby muscles become irritated or tight. Pain can appear during reaching, dressing, lifting, or resting after activity. Stiffness after inactivity is also common, and movement may produce grinding or a rough sensation.

Most people with Shoulder Osteoarthritis notice shoulder pain, but pain may also come from tendons, the neck, or other shoulder conditions. An assessment considers the pattern of pain, range of motion, strength, and relevant medical history.

Keep the shoulder moving gently and pace tasks that provoke symptoms rather than holding the arm still for long periods. Physiotherapy can support range of motion, posture, and strength in the surrounding muscles. Heat or cold may be useful for some people, and a clinician or pharmacist can advise on suitable pain relief based on your health and medicines.

Arrange a clinical review if pain steadily worsens, sleep is repeatedly disturbed, or stiffness interferes with washing, dressing, or work. Seek urgent care for severe pain after injury, a deformed shoulder, sudden inability to move the arm, or new numbness or marked weakness.

Ask which joint is affected, how to maintain movement without aggravation, and whether physiotherapy could help. Ask whether imaging would clarify the cause and which options are suitable if home measures do not control symptoms.