19/03/2026
Can an old injection in the glute cause leg weakness years later? Yes — and here is why.
Many people are surprised to learn that an injection received in the gluteal (buttock) region years ago can still influence how the muscles of the leg work today.
This happens because the gluteal area is not just a large muscles, there is a nerve that can be irritated.
When an injection is performed, especially if it’s injected quickly, without massaging that afterwards, or it ends up with a bruise, it can lead to long-term changes in how the body activates muscles. Even a small disturbance in this region may affect:
• Gluteus maximus and medius activation
• Sciatic nerve mobility and sensitivity
• Motor control patterns during walking, running, or standing
Over time, the body may develop compensatory movement strategies. This means other muscles start working harder to make up for the reduced efficiency of the gluteal muscles.
Common long-term symptoms may include:
• Leg weakness or fatigue
• Poor muscle activation or delayed firing
• Knee, hip, or ankle pain
• Balance problems
• Reduced athletic performance
• Feeling of instability when walking or exercising
From a modern physiotherapy perspective, old injection sites can act as “silent disruptors” in the movement system. Scar tissue or altered tissue glide can disturb normal neuromuscular communication, leading to persistent dysfunction even many years after the original injection.
The good news is that with assessment, manual therapy, re-education, it is possible to restore proper muscle activation and improve movement efficiency.
If you have unexplained leg weakness or chronic lower limb pain — especially with a history of injections in the glute — a detailed functional evaluation may reveal an overlooked root cause.
