De Quervain's tenosynovitis (also called de Quervain's disease) is a condition that affects tendons that attach to two muscles of the thumb—extensor pollicis brevis and abductor pollicis longus.
The deltoid muscle is the main muscle of the shoulder. A triangle-shaped muscle, it helps move your upper arm and stabilizes the shoulder joint.
Shoulder pain, weakness and range of motion loss can keep you from the activities you need and love to do, whether it's lifting boxes on the job, putting away dishes in the kitchen or hitting that powerful tennis serve.
Do you feel aches and pains specifically at the base of your thumb? Do you find that the pain becomes worse when performing certain types of pinching, grasping, or gripping? Have you been experiencing stiffness, weakness, or a loss of motion at the base of the thumb? If any of these describe your symptoms, you may have osteoarthritis of the thumb, also known as basal joint arthritis or thumb arthritis.
There are a number of issues that can cause shoulder pain, including osteoarthritis, rotator cuff injuries, fractures, rheumatoid arthritis or other inflammatory disorders, or osteonecrosis which impacts blood flow to the humerus.
