A subcutaneous injection is a method of delivering medication into the layer of fat and tissue just beneath the skin. This technique is commonly used for vaccines, insulin, and certain medications that need to be absorbed slowly. The injection is typically administered using a syringe and a short needle, allowing for a relatively painless experience. The area for a subcutaneous injection is usually the upper arm, thigh, or abdomen. It is important to rotate injection sites to prevent tissue damage. Proper technique and hygiene are essential to minimize the risk of infection and ensure effective medication delivery.