It depends and you’ll have to consult a doctor to be 100% sure.
For the terminally online like myself, lack of exercise and sendantary life style causes bad circulation. For other people, it could be bad eating habits. For some still, it could be a side effect of another health condition or medication. And each of these situations requires different approaches to improve the circulation.
If I recall right, it’s been stated by the writer that he does score but it wouldn’t be funny to watch so we never see those.
It was still alluded in an episode where he was accidentally thrown in a volcano wanting a virgin sacrifice. He got spat out.