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Pain is a feeling triggered in the nervous system. Pain may be sharp or dull. It may come and go, or it may be constant. You may feel pain in one area of your body, such as your back, abdomen or chest or you may feel pain all over, such as when your muscles ache from the flu.

Pain can be helpful in diagnosing a problem. Without pain, you might seriously hurt yourself without knowing it, or you might not realize you have a medical problem that needs treatment. Once you take care of the problem, pain usually goes away. However, sometimes pain goes on for weeks, months or even years. This is called chronic pain. Sometimes chronic pain is due to an ongoing cause, such as cancer or arthritis. Sometimes the cause is unknown.

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Photograph of a man touching his temples in pain
Results 1 - 10 of 10,976 for pain
  1. Pain (National Library of Medicine)  
    Pain is a feeling triggered in the nervous system. Pain may be sharp or dull. It may come ... or it may be constant. You may feel pain in one area of your body, such as ...
  2. Back Pain (National Library of Medicine)  
    ... my aching back!", you are not alone. Back pain is one of the most common medical problems, ... people at some point during their lives. Back pain can range from a dull, constant ache to ...
  3. Abdominal Pain (National Library of Medicine)  
    ... but your abdomen contains many other important organs. Pain in the abdomen can come from any one of them. The pain may start somewhere else, such as your chest. ...
  4. Chest Pain (National Library of Medicine)  
    Having a pain in your chest can be scary. It does not always mean that you are having a heart attack. ... Get immediate medical care if you have chest pain that does not go away, crushing pain or ...
  5. Chronic Pain (National Library of Medicine)  
    Pain is a feeling set off in the nervous system. Acute pain lets you know that you may be injured ... problem you need to take care of. Chronic pain is different. The pain signals go on for ...
  6. Pain Relievers (National Library of Medicine)  
    Pain relievers are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each ...
  7. Complex Regional Pain Syndrome (National Library of Medicine)  
    Complex regional pain syndrome (CRPS) is a chronic pain condition. It causes intense pain, usually in the arms, hands, legs, or feet. ... in skin temperature, color, or texture Intense burning pain Extreme skin sensitivity Swelling and stiffness in affected ...
  8. Pelvic Pain (National Library of Medicine)  
    Pelvic pain occurs mostly in the lower abdomen area. The pain might be steady, or it might come and go. If the pain is severe, it might get in the way ... re a woman, you might feel a dull pain during your period. It could also happen during ...
  9. Interstitial Cystitis (National Library of Medicine)  
    ... IC) is a condition that causes discomfort or pain in the bladder and a need to urinate ... from person to person. Some people may have pain without urgency or frequency. Others have urgency and ...
  10. Back Pain - How to Prevent Interactive Tutorial (Patient Education Institute)  
    How to Prevent Back Pain Introduction Back pain is one of the most common medical problems people have. It affects most people at least once ... or healthcare professional or a Causes of Back Pain The most common cause of back pain is ...
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