gotta drop a little weight, do more sets of less reps, or just slow down in general. and someone said work on your form, that helps to deter the strain on your arms in areas you're not supposed to be working during whatever motion you're at, curls. massage your arms a bit afterwards if / as needed and maybe some ice too bro? eat more? maybe you're too weak/small for the pace you're setting for yourself, not saying that though i dunno your situation lulz