Is 40.9 a high fever

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Low or no data? Visit zero. A fever usually lasts 3—5 days and most people recover from a mild fever by managing their symptoms at home. However, there are times when you should see a doctor urgently for fever. Although most fevers will settle down in a few days and are not worrying, you sometimes need to seek medical advice. Contact a healthcare provider or call Healthline for advice:.

Is 40.9 a high fever

Fevers are common in children. Fever by itself does not tell you whether your child is seriously sick. Even an ordinary cold can cause a high fever. If your baby with a fever is under 3 months old, you should always see a doctor. The number on the thermometer cannot tell you what is causing the fever or how sick your child is. If your child is miserable and seems unwell, and feels hot, you can use a thermometer to take their temperature. You don't need to do this if your child seems well. Check out how to use thermometers. The most common cause of a fever in a child is a viral infection. A bacterial infection is a less common but more serious cause.

Try to stay at home and avoid contact with other people until you do not have a high temperature. Avoid alcoholtea and coffee as these drinks can cause slight dehydration.

A fever is a high temperature. It can be worrying if your child has a high temperature. Fever is very common and often clears up without treatment. A quick and easy way to find out whether your child has a fever is to take their temperature using a thermometer. Most fevers are caused by infections or other illnesses. The high body temperature makes it more difficult for the bacteria and viruses that cause infections to survive. Your child's temperature can also be raised after vaccinations, or if they overheat because of too much bedding or clothing.

Back to Health A to Z. Unfortunately, you are using an outdated browser. Please, upgrade your browser to improve your experience with HSE. The list of supported browsers:. This page has general information about fever in adults. If you have a child with a fever, see the page on fever in children. A high temperature or fever is when your body temperature is 38 degrees Celsius or higher. It can be a sign that you are unwell.

Is 40.9 a high fever

If you feel like you have a fever, odds are you do! But why is this happening? Could it be a sign of something serious? Everyone experiences illness differently; your fever might be a mild reaction to a new irritant or a sign that your body is fighting off a serious infection. It could also be a symptom of an unknown or surprising cause. Your age, overall health, and environment can all influence how your body reacts to new irritants. Fevers come in all shapes and sizes, affecting every individual differently. In adults, this temporary increase in body temperature

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Gently close the arm over the thermometer and keep it pressed to the side of the body. Unfortunately, you are using an outdated browser. Even an ordinary cold can cause a high fever. A fever usually lasts 3—5 days and most people recover from a mild fever by managing their symptoms at home. Find a condition or health topic by its first letter. Most fevers are caused by infections or other illnesses. This page last reviewed 29 May Place your child on the floor and remove any objects they could knock against. Some digital thermometers beep when they're ready. The pathophysiological basis and consequences of fever. Febrile Seizures.

Top of the page Check Your Symptoms. A fever is the body's normal and healthy reaction to infection and other illnesses, both minor and serious. It helps the body fight infection.

Pain Management. We don't have access to information about you. You feel confused and drowsy. It can be worrying if your child has a high temperature. According to a study in Critical Care , heatstroke is the most deadly heat-related illness. Which problem did you find on this page? In children between the ages of 6 months and 6 years, fever can trigger convulsions. A fever is one of the ways that the body fights infections. Infection is usually the cause of fever The cause of fever is usually an infection of some kind. What causes a fever and do I need medicine? I can't find what I'm looking for. A high fever can also be caused by drug reactions, inflammatory diseases, autoimmune disorders, excess heat exposure, and other non-infectious conditions. See how to take a temperature.