I have lots of small red lumps appeared on knuckle joints on both hands some hurt if i knock them doc says blood tests are normal?

Lumps and bumps: Bumps and lumps on the hand or typically benign and not harmful in fact most hand bumps or lumps probably up to 99% however multiple bumps suggest either and rash or something systemic like for example gout with tophus but there are so many possibilities that it's probably best to go see your PCP first. However if there's any drainage or others sign of infection secure care sooner