Possible causes of arm pain include:

1. Angina (reduced blood flow to the heart)
2. Brachial plexus injury
3. Broken arm
4. Broken wrist
5. Bursitis
6. Carpal tunnel syndrome
7. Cellulitis
8. Cervical disk herniation
9. Deep vein thrombosis (DVT)
10. De Quervain tenosynovitis
11. Fibromyalgia
12. Heart attack
13. Osteoarthritis
14. Rheumatoid arthritis (a condition that can affect the joints and organs)
15. Rotator cuff injury
16. Shingles
17. Shoulder impingement syndrome
18. Sprains (Stretching or tearing of a tissue band called a ligament, which connects two bones together in a joint.)
19. Tendinitis
20. Tennis elbow
21. Thoracic outlet syndrome
22. Ulnar nerve entrapment