Lump under injection site on glute, went in the up right hand side. 3 weeks in and I haven’t had this before. Feels like a normal cock but just an internal lump. No external redness nor is there a external not
How long is your needle, and how much oil did you inject? Had similar issue with my first cycle, I only had 1" needles (maybe 1.5") and was injecting large quantities of sust and deca. Had lumps that felt like golf balls under the injection sites, took a few weeks for them to dissipate.
Heating pad helps that what told me at hospital , try rolling around on it i little after you inject.