Thanks for posting your query.
From description it seems to be soft tissue injury
over your hand.
These hard lumps are blood collection(haematoma
) which might get organised. This may take few weeks to get dissolved. Apply hot fomatation over it.
You can take anti-inflammatory drug like motrin
to reduce pain and inflammation after discussing with your doctor. Avoid lifting and rest well.
Wishing you good health
Dr Saurabh Gupta