
Anxiety disorders - Symptoms and causes - Mayo Clinic
Jul 29, 2025 · Symptoms Common anxiety signs and symptoms include: Feeling nervous, restless or tense. Having a sense of impending danger, panic or doom. Having an increased heart rate. …
Nervous breakdown: What does it mean? - Mayo Clinic
Apr 26, 2023 · Nervous breakdown isn't a medical term. It most often means a mental health crisis that affects your ability to meet your own needs and do daily tasks.
Central nervous system (CNS) lymphoma - Mayo Clinic
5 days ago · Learn about central nervous system lymphoma, a cancer of the brain and nervous system, including symptoms, causes, diagnosis and treatment options.
Multiple sclerosis - Symptoms and causes - Mayo Clinic
Nov 1, 2024 · In multiple sclerosis, the protective coating on nerve fibers, known as myelin, in the central nervous system is damaged. Depending on the location of the damage in the central nervous …
Epilepsy - Symptoms and causes - Mayo Clinic
Oct 14, 2025 · Epilepsy is a brain condition that causes recurring seizures. There are many types of epilepsy. In some people, the cause can be found. In others, the cause is not known. Epilepsy also is …
Vagus nerve stimulation - Mayo Clinic
Dec 20, 2024 · Overview Vagus nerve stimulation involves using a device to send electrical impulses to the vagus nerve. The vagus nerve is the main nerve of the system that controls digestion, heart rate …
Niacin - Mayo Clinic
Niacin is a B vitamin the body makes. The body uses niacin to turn food into energy. It helps keep the nervous system, digestive system, and skin healthy. People may take niacin, also called vitamin B-3, …
Peripheral neuropathy - Symptoms and causes - Mayo Clinic
The peripheral nervous system sends information from the brain and spinal cord, also called the central nervous system, to the rest of the body through motor nerves. The peripheral nerves also send …
Methylphenidate (oral route) - Side effects & dosage - Mayo Clinic
Mar 1, 2026 · Description Methylphenidate is used to treat attention deficit hyperactivity disorder (ADHD). It belongs to the group of medicines called central nervous system (CNS) stimulants. …
Medical Diseases & Conditions - Mayo Clinic
Explore comprehensive guides on hundreds of common and rare diseases and conditions from the experts at Mayo Clinic.