- Sudden or severe
- Painful or red
- Only on one side of the body
- Accompanied by chest pain or trouble breathing
- Paired with fatigue, fever, or dizziness

Bottom Line
Occasional swelling is usually not serious, but persistent or unexplained swelling may signal heart, kidney, liver, or circulation problems. Paying attention to these changes can help detect health issues early.
Sources:
- Mayo Clinic
- Cleveland Clinic
- WebMD
