Injections deliver liquid medications, fluids, or nutrients directly into a person’s body. Different types of injections include intravenous, intramuscular, subcutaneous, intraosseous, and ...

You can rotate to different areas of your abdomen, keeping injection sites about an inch apart. Or you can inject insulin into your thigh, arm, and buttocks.

However, this site is not common for self-injection because its small muscle mass limits the volume of medication that can be injected — typically no more than 1 milliliter.

After receiving an injection, some people experience symptoms at the injection site on the skin. This reaction is a common adverse effect of vaccines, Botox injections, biologics, and chemotherapy.

One common complaint of monkeypox vaccination is a hard red bump at the injection site. But there's no need to worry about it, experts say.

Lipohypertrophy is when lumps of fat or scar tissue develop under the skin because of repeat injections or infusions. Learn about the causes, symptoms, and treatment options for this condition today.