This page summarises publicly available NHS information for educational purposes only. It is not medical advice or a diagnosis. Always consult a qualified healthcare professional.
What is glandular fever?
Glandular fever, also known as infectious mononucleosis or 'mono', is a common viral infection usually caused by the Epstein-Barr virus. It is most common in teenagers and young adults aged 15 to 24. Symptoms include a high temperature, severely swollen glands in the neck and elsewhere, a severe sore throat, extreme tiredness, and sometimes a rash. Glandular fever usually gets better on its own within 2 to 4 weeks, though tiredness can last longer.
When NHS resources suggest seeing a GP
- You have a very high temperature, or feel hot, cold or shivery
- You have a severe sore throat that is not getting better
- You have swelling on either side of your neck (swollen glands)
- You have extreme tiredness or exhaustion
- You have difficulty breathing or swallowing
- Symptoms have not improved after 2 to 3 weeks
Self-care information from NHS
- Rest and get plenty of sleep
- Drink plenty of fluids to stay hydrated
- Take paracetamol or ibuprofen for pain and fever
- Gargle with warm salty water to soothe a sore throat
- Wash your hands regularly and do not share cups or cutlery
- Avoid kissing others and contact sports for at least a month (spleen may be enlarged)
Common questions
How long does glandular fever last?
Most people start feeling better within 2 to 4 weeks, but tiredness and fatigue can linger for several months. It is important to rest and avoid overexertion during recovery.
Is glandular fever contagious?
Yes. It spreads through saliva — hence the nickname 'kissing disease'. You can pass it on through kissing, sharing cups or cutlery, or coughs and sneezes. You may be infectious for weeks.
Can I play sports with glandular fever?
Avoid contact sports and strenuous exercise for at least one month after diagnosis, because glandular fever can enlarge your spleen and make it vulnerable to injury.
Can you get glandular fever twice?
Most people only get glandular fever once, as your body builds immunity to the Epstein-Barr virus after infection. However, the virus stays in your body and can occasionally reactivate without causing the same illness.
Get personalised NHS information
Describe your specific situation and receive a structured summary of relevant NHS information, tailored to your age, gender, and symptoms.
Check my symptomsFree · ~60 seconds · Not medical advice
Related neck topics
This page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about your individual situation. NorMed organises publicly available NHS information and is not affiliated with the NHS.