My mother has a abdominal wall hematoma, her pain gets intense toward night. she is using hot compresses, any ideas how i can help her be comfortable?

Drainage if possible: Of course I am curious about the origin and exact location of the hematoma. Assuming that it is externally caused and accessible I would recommend incision and drainage, with or without packing. These lesions, as you know, can be painful and even become infected.. Draining it is usually a minor procedure done under local anesthesia. Have her doctor clear her and get it done.