Why does it burn so bad after testosterone injection?

The burning sensation after a testosterone injection can occur due to several factors, including the viscosity of the oil used as a carrier, the injection technique, or irritation of the tissue at the injection site. Some formulations contain alcohol or other additives that may cause discomfort. Additionally, if the injection is not administered properly or if the needle is too large, it can lead to more trauma in the muscle, resulting in pain. Proper technique and using the right needle size can help minimize this discomfort.