Possible causes of Arm swelling

14 conditions can cause this symptom. Most common are listed first.

• Allergic reaction Common Urgent Pediatric
• Cellulitis (skin infection) Common Pediatric
• Common spider bite Common Pediatric
• Contusion (bruise) Common Pediatric
• Deep venous thrombosis (DVT, venous blood clot) Common Urgent
• Fracture (broken bone) Common Pediatric
• Muscle tear Common Pediatric
• Bone cancer (bone tumor) Urgent
• Lymphangitis (lymph tissue inflammation)
• Necrotizing fasciitis (soft tissue infection) Urgent
• Sarcoma (soft tissue cancer)
• Septic arthritis (joint infection) Urgent
• Vascular insufficiency (claudication)
• Vasculitis (inflammation of the arteries)