Possible causes of Swelling of both legs

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

• Baker's cyst (fluid sac behind knee) Common
• Cellulitis (skin infection) Common Pediatric
• Chronic venous insufficiency (CVI) Common
• Congestive heart failure (CHF) Common Urgent
• Contusion (bruise) Common Pediatric
• Deep venous thrombosis (DVT, venous blood clot) Common Urgent
• Fracture (broken bone) Common Pediatric
• Ligament tear Common
• Muscle strain (pulled muscle) Common Pediatric
• Osteoarthritis Common
• Sprain Common Pediatric
• Behçet (mouth, eye, and genital ulcers)
• Cirrhosis (liver failure and scarring) Urgent
• Hypothyroidism (low thyroid hormone)
• Myxedema coma (severe low thyroid) Urgent
• Necrotizing fasciitis (soft tissue infection) Urgent
• Overuse syndrome
• Renal failure, acute (sudden kidney failure) Urgent
• Renal failure, chronic (kidney failure)
• Rheumatoid arthritis
• Sarcoma (soft tissue cancer)
• Cancer (tumor)
• Gout (uric acid crystals in the joint causing inflammation)
• Pseudogout (calcium deposit arthritis)
• Septic arthritis (joint infection) Urgent
• Vasculitis (inflammation of the arteries)