Understanding High Temperature: What the NHS Advises

A high temperature, commonly known as a fever, is a sign that your body is fighting an infection or other condition. The NHS provides clear guidance on recognizing, measuring, and managing raised body temperature. This article explains what constitutes a high temperature, how to assess it properly, and when to seek medical advice, drawing on expert insights from NHS professionals.

What Is a High Temperature?

A high temperature occurs when the body’s core temperature rises above the normal range of 36.1°C to 37.2°C (97°F to 99°F). A fever is typically defined as a temperature of 38°C (100.4°F) or higher. While a fever can be a natural response to illness, such as a viral or bacterial infection, persistent or extremely high temperatures may require attention. Dr. Sarah Bridges, a paediatric consultant at Musgrove Park Hospital, emphasizes that in children, a fever is often a sign of the body actively combating an infection.

How to Measure Temperature Accurately

Accurate measurement is crucial for determining whether a temperature is elevated. NHS guidelines recommend using a reliable thermometer, such as digital or auditory types. The method depends on the individual’s age and comfort. For adults and children over five, measuring under the arm with a digital thermometer is common. For infants, a rectal or temporal artery thermometer may be more accurate. Dr. Mike Coates, an NHS advisor, stresses the importance of following proper technique to avoid false readings. A lesson for health and care workers highlights that consistent measurement methods are essential for reliable results.

When to Seek Medical Attention

While most fevers resolve on their own, the NHS advises seeking help if specific symptoms arise. For adults, Dr. Coates recommends monitoring for severe symptoms like difficulty breathing, chest pain, or a temperature exceeding 40°C (104°F). In children, the risk is higher. Dr. Bridges warns that infants under three months with a temperature above 38°C (100.4°F) require immediate medical review. Older children and adults should consult a GP if a fever persists for more than three days, worsens, or is accompanied by concerning symptoms like a rash or dehydration.

Caring for Someone with a High Temperature

Managing a fever involves supportive care rather than aggressive treatment. Dr. Coates suggests keeping the affected person hydrated, offering fluids like water or electrolyte solutions