An epidural blood patch is a medical procedure used to treat a condition called spinal headache, which can occur after a lumbar puncture or spinal anesthesia. During the procedure, a small amount of the patient's own blood is drawn and then injected into the epidural space of the spine. This helps to seal any leaks in the spinal fluid, alleviating the headache. The procedure is typically performed in a hospital or clinic by a trained healthcare professional. It is considered safe and effective, with most patients experiencing relief from their symptoms shortly after the injection. Side effects are generally minimal and may include temporary discomfort at the injection site.