Subcutaneous injections are a method of delivering medication just beneath the skin, into the layer of fat and tissue. This technique is commonly used for vaccines, insulin for diabetes, and certain hormones. The injection is typically given in areas like the upper arm, thigh, or abdomen, where there is enough fatty tissue to absorb the medication effectively. The process involves using a small needle and syringe, making it relatively easy and quick. Patients can often learn to give themselves these injections at home, which provides convenience and helps manage their health conditions, such as those requiring insulin for diabetes.