My arm seems swollen after playing badminton.

Generally, swelling in the arm after playing badminton may be caused by physiological factors or pathological conditions such as muscle strain or ligament injury. It is recommended to seek medical attention at a hospital to determine the exact cause. The specific analysis is as follows:

1. Physiological Factors

If one has been inactive for a long time or engages in little physical activity, suddenly increasing the amount or intensity of exercise may lead to arm swelling. It is recommended to rest adequately and apply local heat therapy and massage to promote symptom relief.

2. Pathological Factors

1) Muscle Strain
Inadequate warm-up before exercise, incorrect posture, or excessive fatigue may result in tearing injuries to the arm muscles, causing swelling and pain. It is recommended to rest sufficiently and apply ice packs locally to promote vasoconstriction and alleviate symptoms such as swelling and pain.

2) Ligament Injury
Prolonged or overly intense exercise may subject ligaments to strong forces exceeding their tolerance limit, resulting in ligament damage and causing arm pain and weakness. It is recommended to rest adequately and use elastic bandages to compressively wrap the affected joint to help improve symptoms.

In addition to the above causes, other conditions such as tenosynovitis may also be responsible. If swelling persists without improvement, timely medical treatment is necessary to avoid delayed diagnosis and worsening of symptoms.