buttocks

A hard lump on the buttocks following a testosterone injection can be concerning and uncomfortable. Often referred to as an injection site reaction, this may occur due to factors like improper injection technique or the needle not penetrating deeply enough. The body’s response to the oil-based solution can also cause fluid to pool under the skin. These lumps, typically benign, resolve over time but may cause redness or tenderness. To minimize risks, rotate injection sites, use the appropriate needle size, and maintain aseptic techniques. Seek medical advice if the lump persists, worsens, or shows infection signs.