The safest place to give a testosterone shot in the buttocks is the ventrogluteal site, located on the upper side of the hip, or the dorsogluteal site, located in the upper outer quadrant of the buttock. Both sites have enough muscle depth to absorb oil-based testosterone, but the exact spot matters because the sciatic nerve runs through the middle of the gluteal region and can be seriously injured by a misplaced needle.
The Two Buttock Injection Sites
There are two distinct sites on the buttocks used for intramuscular testosterone injections, and they’re not interchangeable in terms of risk.
The ventrogluteal site sits on the side of the hip, slightly forward from where most people picture “the buttock.” It’s the preferred site in current clinical practice because it has a thick layer of muscle, minimal major blood vessels, and is far from the sciatic nerve. To find it, use what’s called the V method: if you’re injecting on your left side, place the palm of your right hand over the bony prominence at the top of your thigh (the greater trochanter). Point your index finger toward the front of your hip bone (the anterior superior iliac spine). Spread your middle finger back toward the top of your hip ridge. Your two fingers form a V shape, and the injection goes right into the center of that V.
The dorsogluteal site is the traditional “upper outer quadrant” of the buttock. To locate it, imagine dividing one buttock cheek into four equal squares. The injection goes into the upper, outermost square only. A more precise landmark: the safe zone sits above an imaginary line drawn from the dimple at the base of your spine (the posterior superior iliac spine) to the bony point at the top of your outer thigh (the greater trochanter). Anything below or toward the center of that line puts the sciatic nerve at risk.
Why Location Matters This Much
The sciatic nerve is the largest nerve in the body, and it runs right through the middle of the gluteal region, typically passing deep beneath the piriformis muscle. It is the most commonly injured nerve from intramuscular injections. Injecting too far toward the center of the buttock or too low is the major cause of sciatic nerve injury.
When the needle hits or comes close to the sciatic nerve, the sensation is unmistakable: an immediate electric shock or burning pain shooting down the leg. Depending on severity, the damage can range from temporary numbness to lasting weakness, sensory loss, or chronic pain that doesn’t respond well to pain medication. The outer branch of the nerve (the peroneal division) is injured more often because of its position and the way it’s tethered in place. If you ever feel a sharp, radiating jolt during injection, stop immediately and withdraw the needle.
Choosing the Right Needle
Testosterone is an oil-based medication, which makes it thicker than water-based injections and slower to draw up and push through a needle. For adult gluteal injections, a 22- or 23-gauge needle that is 1 to 1.5 inches long is standard. The gauge refers to the needle’s thickness (lower numbers are thicker), and the length needs to be enough to reach deep into the muscle rather than depositing the oil into the fat layer above it. People with more subcutaneous fat over the gluteal area may need a longer needle.
Many people use a separate, larger-gauge needle to draw the testosterone out of the vial, then swap to a fresh, sharper needle for the actual injection. This makes the injection less painful because drawing through the rubber stopper can dull the needle tip. A 1 mL or 3 mL Luer-Lock syringe (the kind that twists on securely) works well for most testosterone doses.
Preparing the Injection
Warming the vial in your hands for a few minutes before drawing up the medication thins the oil slightly and helps it flow into the syringe faster. Once warmed, clean the top of the vial with an alcohol swab and let it air dry completely.
After drawing up the correct dose, hold the syringe with the needle pointing up and look for large air bubbles. Tap the side of the syringe so the bubbles float to the top, then gently push the plunger until the air is expelled back into the vial. Double-check that the correct amount of medication remains in the syringe before removing the needle from the vial.
Clean the injection site with an alcohol swab using a circular motion, starting from the center and spiraling outward. Let the skin dry before inserting the needle. Injecting through wet alcohol can sting and may carry surface bacteria into the tissue.
Performing the Injection
Stretch the skin at the injection site taut with your non-dominant hand. This stabilizes the tissue and can make needle insertion less painful. Insert the needle at a 90-degree angle in one smooth, confident motion. Hesitating or going slowly tends to hurt more.
You may have been taught to pull back on the plunger (called aspiration) before injecting to check for blood. Current CDC guidelines state that aspiration is not necessary for intramuscular injections at recommended sites because no large blood vessels are present in these areas. Skipping this step also makes the process quicker and less uncomfortable.
Push the plunger down slowly and steadily. Oil-based testosterone takes longer to inject than thinner medications, so expect to spend 10 to 15 seconds pushing the full dose in. Rushing it increases pressure in the muscle and causes more post-injection soreness. Once the syringe is empty, wait a couple of seconds before pulling the needle straight out at the same angle it went in.
After the Shot
If there’s any bleeding at the site, apply gentle pressure with a cotton ball or gauze. Don’t rub or massage the area, as this can increase bruising and push the medication around in the tissue unpredictably. A small amount of soreness or a firm lump under the skin for a day or two is normal, especially with oil-based formulations.
Signs that something isn’t right include increasing redness, warmth, or swelling at the site over the following days (which could indicate infection), or any persistent numbness, tingling, or weakness in the leg (which could suggest nerve involvement).
Rotating Your Injection Sites
Injecting testosterone into the same spot repeatedly causes scar tissue to build up in the muscle. Over time, scar tissue makes injections more painful and can interfere with how well the medication absorbs. Alternate between your left and right sides with each injection, and keep a simple log of which side you used last. If you’re injecting every one to two weeks, this gives each site at least two weeks to recover.
You can also rotate between the ventrogluteal and dorsogluteal sites, or include the outer thigh (vastus lateralis) as a third option. Having three or four sites in your rotation minimizes tissue damage over months and years of ongoing therapy.