I aam being bit. its big lumps on hands arms legs back and butt. i seen a bug red and flat is it bedbugs or fleas?

Bit at night ?: While you are in bed? Possibly bed bugs. Follow the below link for pictures: https://www.Google.Com/search?Q=bed+bugs;espv=210;es_sm=93;source=lnms;tbm=isch;sa=x;ei=xeh3ut21byjfsatstod4aw;ved=0cakq_auoaq;biw=1920;bih=979;dpr=1.

Bedbugs vs fleas: Bedbugs signs: 1. Blood smears on bedding (turn black over time). 2. Amber colored “shells” = shedded exoskeletons. 3. Bug feces on sheets (brown- black dots). 4. W heavy infestation, bug's secretions leave “musty sweet”odor. Don't expect to “see” eggs. They're nocturnal ; in small crevices, translucent ; 1/16th inch long. Adults are 1/4th inch long ; flat. Bed bug bites may have no sx's/signs.