Glandular fever, also known as infectious mononucleosis, typically lasts around 2 to 4 weeks for most symptoms to improve, such as fever and sore throat. However, fatigue and tiredness can persist for several months in some cases. The infection usually resolves on its own without treatment, but recovery can be slow, especially the prolonged tiredness, which may last over six months in rare cases. During the illness, swollen glands, sore throat, and fever are common, with the spleen sometimes becoming enlarged, which requires careful monitoring and avoiding physical strain until fully healed.

Duration of Key Symptoms

• Fever and sore throat generally last 1 to 2 weeks.
• Fatigue and lack of energy often last the longest, potentially several months.
• Swollen spleen (if present) usually returns to normal within 4 to 6 weeks.
• The virus can be contagious for up to 6 months after infection.

Recovery Notes

Most people feel better within a month, but some experience prolonged tiredness known as chronic fatigue syndrome. Rest, avoiding strenuous activities, and supportive care help the recovery process.