Causes of sacroiliac arthritis include degenerative joint disease, trauma, etc. Aggravation after swimming can be treated with rest, medication, physiotherapy and other methods. 1. Oral medication: sacroiliac arthritis can usually be taken orally to promote cartilage repair, protection of cartilage drugs, such as chondroitin sulfate, glucosamine sulfate, etc., chondroitin sulfate and glucosamine sulfate side effects are mainly digestive discomfort symptoms, etc.; in addition to taking non-steroidal anti-inflammatory drugs such as diclofenac sodium, diclofenac sodium may be a headache, drowsiness and other side effects. 2. Physical therapy: on the basis of drug treatment, infrared therapy, electromagnetic therapy, acupuncture and other physical therapy methods can be used to promote blood circulation in the joints, so that local muscle spasms can be relieved to relieve pain symptoms. 3. Closed drug injection: If the pain of sacroiliac arthritis is obvious in the acute stage, or accompanied by activity disorder and other manifestations, you can inject closed drugs in the sacroiliac joints, such as triamcinolone acetonide, lidocaine and so on, which can play the role of anti-inflammatory and pain relief. It should be noted that injection of closed drugs may have side effects such as allergic reactions. Sacroiliac arthritis aggravation, should rest more, reduce activities, it is recommended to go to the regular hospital in time, timely treatment.