A wrong intramuscular (IM) injection can, in rare but serious cases, lead to paralysis or nerve damage. Here's a breakdown of how this can happen: 1. Nerve Injury Injecting into or too close to a major nerve — particularly: Sciatic nerve in the buttock (gluteal region) Radial nerve in the deltoid region Femoral or lateral femoral cutaneous nerves in the thigh Result: Immediate sharp pain, weakness, numbness, or even long-term paralysis in the affected area. 2. Incorrect Site Selection Using the