Subcutaneous injections are a method of delivering medication just beneath the skin, into the fatty tissue. This technique is commonly used for vaccines, insulin, and certain hormones. The injection is typically given in areas like the upper arm, thigh, or abdomen, where there is a layer of fat. The process is relatively simple and can often be done at home. A small needle is used to inject the medication, allowing it to be absorbed slowly into the bloodstream. This method is preferred for medications that need to be released gradually, providing a steady effect over time.