Causes of an acute hot swelling in or around a joint
| Acute arthritis | Peri-arthritis |
| Gout | Bursitis |
| Pseudogout | CPPDD (calcium pyrophosphate deposition disease |
| Sero-positive arthritis (for example, rheumatoid) | |
| Sero-negative arthritis (for example, Reiter’s syndrome) | |
| Sepsis | |
| Haemarthrosis |