Is there any way to help a seroma reabsorb on its own?

Small seromas resolve over time, but larger ones usually require aspiration. Ask your surgeon for advice.

Without examining you it's difficult to know what might work for your particular seroma but some smaller ones can re absorb on their own with compression and time. Anything that is large enough to be clinically detectable will probably require at least an aspiration followed by compression. Resistant seromas may require insertion of a drain or even a formal surgical drainage with a suture closure of the dead space. The only way to know for sure is to be examined so see your surgeon again or book a consultation with another board-certified plastic surgeon near you for a proper assessment. Best of luck!