Difficulty
beginner
Max Volume
3.0ml
Needle Gauge
23-25G
Needle Length
1-1.5"
Description
The vastus lateralis is the large muscle on the outer side of the thigh. It is easily accessible, has good muscle mass, and is relatively safe for self-injection.
PIP Likelihood:
★
★
★
★
★
✓ Beginner Friendly
Injection Technique
1. Divide the thigh into thirds from hip to knee 2. Use the middle third of the outer thigh 3. The muscle is about a hand's width from the side of the leg 4. Sit or lie down for stability 5. Clean the area 6. Pinch the muscle if needed 7. Insert at 90-degree angle 8. Aspirate and inject slowly 9. Withdraw and apply pressure
Rotation Schedule
Excellent for frequent rotation. Can alternate between left and right thighs, and move up/down within the middle third. Allow 3-4 days per site.
Common Mistakes
Injecting too far forward (rectus femoris) or too far back (hamstrings), not using middle third, injecting while standing (muscle tension).
⚠️ Nerve & Safety Warnings
Relatively safe. Avoid the inner thigh where major blood vessels run. Stay on the outer aspect of the thigh.