What should you know about glandular fever symptoms?

Symptoms may build gradually rather than arriving together. The throat can be very sore, the tonsils may look enlarged, and glands in the neck can become tender. Fever and a general unwell feeling may sit alongside heavy tiredness that makes school, work or exercise difficult.

Symptoms overlap with other infections, so a clinician may use an examination and appropriate testing before confirming the cause. A rash, night sweats or reduced appetite can also occur. The pattern and change over time matter more than one symptom in isolation.

Rest, drink regularly, and choose soft foods or cool drinks if swallowing hurts. Use only pain or fever medicines that are suitable for you and follow the label or a clinician’s instructions. Avoid strenuous contact activity until medical advice confirms it is safe, because the spleen can enlarge during glandular fever.

Plan lighter days and return to activity gradually as energy improves. Arrange a GP consultation if symptoms are severe, persistent or interfering with hydration or daily function. Read more about Sore Throat and Swollen Glands.

Get urgent help for difficulty breathing or swallowing saliva, severe dehydration, confusion, fainting, or intense or worsening upper-abdominal pain. These warning signs need prompt assessment.

Seek medical advice if fever continues, throat pain is worsening, or fatigue is preventing basic activities. Sudden deterioration matters even when the illness began with familiar glandular-fever symptoms.

Ask what features support glandular fever, whether testing is appropriate, which activities to avoid, and how to recognise dehydration or a spleen-related emergency.