@Topps_Baseball88 if injection just warm up and massage it lightly.( short answer yes after injection) , it could have formed a few days after because i didnt even know it was there till i pushed on my right pec Monday I was feeling my right pec for a possible injection spot and I pressed down I felt a lump, its not on or behind my nipple its on the injection spot i used, Same thing happened with my ventro glute one time on cycle , i think I'm more concerned because it's the pec and we'll gyno not that I have that just why I got concerned lol.
Please NEVER inject your chest again, it's dangerous, same with quads.
normal injections sites:
Left Glute, Right Glute
Left Shoulder, Right shoulder
left Bicep, right Bicep (head up to 1/2ml)
You have plenty of clean and easy to reach injection sites, use them.