Higher than normal body temperature

Fever, also known as pyrexia, is a raise in body temperature above normal range. It is a common medical sign that accompanies various conditions, some mild & others more serious.
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Fever usually indicates an underlying infection of some sort. Normal body temperature is around 37°C, & any temperature of 37.5°C (99.5°F) & above is considered a fever. Chills is a symptom that often accompanies a fever, as well as feeling cold.


The most common cause of a fever is a flu, cough or cold. Other infections that can cause fever include ear infections, tonsillitis, urinary tract or kidney infections, & childhood conditions like chicken pox & whooping cough. You may also have a raised temperature following a vaccination, or from becoming overheated. Children have a harder time regulating their body temperature than adults, & can become feverish due to too much bedding or clothing.


Recurrent or constant pain in or around the eyes
Sudden eye pain
Itching or burning eyes
Changes in vision, such as blurring, double vision, or obstruction
Seeing halos around lights or flashing lights
Photosensitivity (painful or significant sensitivity to light)
Swollen eyelids
Discharge from the eye
Please note that sudden, unexplainable blurred vision is an emergency, as it can indicate a stroke or a retinal detachment.

What to do next?

If you are experiencing a fever, with or without other symptoms, we recommend that you come for an appointment & a diagnosis. You can book using our online system, or give us a call during office hours to make your appointment.

020 7323 1023
Harley Street Area, W1
020 3553 1798
City of London, EC3V