The endocrine system is a network of glands located throughout the body that are vital to almost all of the body’s functioning. The glands release hormones (chemical messengers that enable cells to communicate with one another) that control things like development, growth, and much more. Having too much — or too little — of these hormones can lead to a variety of problems. Medication can often be used to regulate hormones to maintain optimal levels. In some cases, a more complex treatment plan may be required.