Adrenaline increases the "alertness" of the nervous system, meaning it's ready to trigger muscle contraction. It also increases the amount of blood flow and changes the tension of the muscles, which, ...

Have you ever experienced an annoying, persistent twitch in your eyelid? Eye twitching — also known as myokymia — is a common phenomenon that most people encounter at some point in their lives. While ...

Have you ever felt your eyelid suddenly flutter or twitch uncontrollably? This common annoyance, called eye twitching (or myokymia), is usually harmless and fades quickly. But when it persists, you ...

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

People with high-functioning anxiety often excel at work but feel they lack a greater purpose. Could you have high-functioning anxiety?

Living with anxiety isn't just about feeling nervous before a big presentation or worrying about life's challenges. For millions of people, anxiety runs deeper, casting a shadow over daily life in ...