What should I do if my finger is poked and my knuckles are swollen?

Finger poked joint swelling, may be found in soft tissue injury or fracture caused by edema, you can take general treatment, drug treatment, physical therapy to reduce symptoms.
1. Soft tissue injury: finger contusion caused by joint swelling and pain, need to pay attention to rest, and emergency braking. If the local swelling is more serious, the affected limb should be elevated, and then eliminate the swelling through hot compresses.
If the finger contusion joint swelling accompanied by strong pain, can be prescribed oral non-steroidal anti-inflammatory drugs, such as diclofenac sodium, aspirin, etc., but also to the local injection of lidocaine for pain.
2. Fracture: If the fracture is only mild, you can first consider doing physical therapy, such as microwave physiotherapy, infrared physiotherapy, etc., with pain, anti-inflammatory effect. If the fracture is more serious, immobilization and repositioning are needed to prevent re-fracture. When there is pain, take oral ibuprofen for pain relief.
Regarding the above kinds of treatment, all of them can be used for finger contusion joint swelling, but regular observation should be made during the treatment period, and urgent medical attention should be sought if the effect is not satisfactory.