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Dr. Chrysoula I. Liakou MD, PhD
- Treated online: Yes, usually. Video assessment and self-care; antibiotics do not help.
- Glandular fever is a viral infection, so antibiotics do not help; the fatigue can last weeks, and contact sports are avoided while the spleen may be enlarged.
- Glandular fever is most often caused by the Epstein-Barr virus, spreads mainly through saliva, and is common in teenagers and young adults.
- Amoxicillin and ampicillin frequently trigger a widespread, blotchy, itchy rash in people who actually have glandular fever.
- If you have sudden severe abdominal pain or struggle to breathe, call 112.
Glandular fever occasionally causes complications that need in-person care now. Sudden severe pain in the upper left side of the abdomen or the tip of the left shoulder can signal a problem with the spleen and is an emergency. Difficulty breathing, noisy breathing, drooling, or being unable to swallow your own saliva because of swollen tonsils also needs urgent assessment, as does being unable to keep any fluids down. If you have sudden severe abdominal pain or struggle to breathe, call 112.
Can an online doctor treat glandular fever?
Glandular fever is caused by a virus, so there is no antibiotic or antiviral that cures it, and care is about managing symptoms safely while the body recovers. A video consultation can confirm the likely diagnosis, arrange a blood test to be sure, and give you clear advice on rest, pain relief and protecting your spleen. Severe swelling that threatens breathing or swallowing needs in-person care.
Because glandular fever is diagnosed from the pattern of symptoms and a blood test rather than a physical examination, it suits video assessment well. The doctor takes the history, looks at your throat and glands on camera, and, crucially, tells you honestly what the weeks ahead usually look like, which is the part most people are never properly warned about.
How an online consultation helps with glandular fever
glandular fever is frequently mistaken for bacterial tonsillitis and treated with antibiotics that do nothing and can trigger a rash. The doctor separates the two and arranges the blood test that settles it.
you are told plainly that the deep fatigue can last several weeks, sometimes longer, so you can plan work, study and exercise around a realistic timeline rather than a hopeful one.
the doctor explains why contact sports and heavy lifting are paused while the spleen may be enlarged, and when it is safe to return, which is genuinely important and often missed.
you leave knowing the specific warning signs (severe abdominal pain, breathing or swallowing trouble, dehydration) that mean urgent in-person care rather than waiting it out.
What is glandular fever?
Glandular fever, also called infectious mononucleosis or simply mono, is an infection most often caused by the Epstein-Barr virus (EBV).[1] It is common in teenagers and young adults, though it can occur at any age. The virus spreads through saliva, which is why it has earned the nickname the kissing disease, but it also passes on shared cups, cutlery, toothbrushes and through coughs and sneezes. Many people are infected with EBV in childhood with few or no symptoms; when infection happens later, the illness tends to be more pronounced.
The classic combination is a severe sore throat, a high temperature, and swollen, tender glands in the neck and elsewhere, together with a level of tiredness that is out of proportion to an ordinary throat infection. Some people also notice a swollen spleen, mild yellowing of the skin, puffy eyes or a rash. The sore throat and fever usually ease within two to three weeks, but the fatigue is the symptom that lingers.[1]
Why antibiotics do not help, and the amoxicillin rash
Because glandular fever is viral, antibiotics have no effect on it whatsoever.[1] This matters for more than stewardship. Glandular fever looks a great deal like bacterial tonsillitis, so it is often treated with antibiotics before the diagnosis is clear, and one group in particular causes a problem: amoxicillin and ampicillin (aminopenicillins) frequently trigger a widespread, blotchy, itchy rash in people who actually have glandular fever.[1][4] This rash is not usually a true, lasting penicillin allergy, but it is unpleasant and alarming, and it is a well-recognised clue that the underlying illness was glandular fever all along. Sorting out whether a sore throat is likely glandular fever, likely bacterial tonsillitis, or an ordinary viral sore throat is exactly the kind of decision a careful consultation is for, and it is why unnecessary antibiotics for a sore throat are worth avoiding. Antibiotics are only prescribed when there are genuine signs of a bacterial infection, and they do not work against viruses.[3]
How long does glandular fever last?
The acute phase, the sore throat, fever and worst of the swollen glands, usually improves within two to three weeks. The tiredness is different. It is normal for fatigue to persist for several weeks after the other symptoms have gone, and in some people a lower level of tiredness lingers for a few months before energy fully returns.[2] This is a recognised part of the illness, not a sign that something is wrong, but it is also why glandular fever is so disruptive to exams, work and training, and why pacing yourself matters.
Recovery is helped by the simple basics: rest without forcing yourself back too soon, regular fluids, and paracetamol or ibuprofen for the fever and sore throat. There is no tonic, supplement or medicine that speeds up clearance of the virus, and pushing hard through the fatigue tends to set recovery back rather than forward.[5] A phased return to normal activity, adding a little at a time and easing off if the tiredness flares, works better than an all-or-nothing approach.
Protecting your spleen: why contact sports wait
Glandular fever often enlarges the spleen, an organ tucked under the left side of the ribcage. An enlarged spleen is more fragile, and a blow to the abdomen or a sudden strain can, rarely, cause it to rupture, which is a life-threatening emergency. For this reason, contact and collision sports, heavy lifting and vigorous exercise are avoided in the early weeks of the illness while the spleen may be enlarged, commonly for at least the first three to four weeks and sometimes longer depending on how you recover.[1] Your doctor advises on timing for your situation. Sudden severe pain in the upper left abdomen, or pain referred to the tip of the left shoulder, needs emergency assessment, as it can be the first sign of a splenic problem. This single piece of advice is one of the most important reasons to have glandular fever properly assessed rather than self-diagnosed.
How doctors decide if glandular fever is safe to manage online
Whether glandular fever can be managed with online care depends on how severe the symptoms are and whether any complication is developing. The table below shows how doctors sort the presentations.
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| Glandular fever presentation | Likely first step | Suitable for online care? | When referral or in-person care is needed |
|---|---|---|---|
| Typical illness, sore throat and fatigue, still able to drink and swallow | Supportive care, spleen advice, and a blood test to confirm | Usually yes | If symptoms worsen or a complication develops |
| Diagnosis uncertain (could be strep or glandular fever) | Assessment plus a blood test to distinguish them[1] | Yes, for assessment and test referral | In person for the blood test and any throat swab |
| Very swollen tonsils, struggling to swallow saliva or breathe | Urgent in-person assessment of the airway | No | Same-day: airway swelling can be an emergency |
| Prolonged fatigue beyond the expected weeks | Review to check recovery and exclude other causes | Yes | In person if fatigue is not settling or new symptoms appear |
| Severe upper-left abdominal or left shoulder-tip pain | Emergency care for a possible spleen problem | No | Call 112 immediately |
Availability of individual medicines and who may prescribe them vary by country; your doctor confirms what applies where you are.
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See available times →What the doctor checks in an online glandular fever consultation
The assessment is a structured history plus a careful look on camera, aimed at confirming the diagnosis and ruling out complications. In a glandular fever consultation the doctor will typically check:
- The symptom pattern: how long you have had the sore throat, fever and swollen glands, and how the fatigue compares with an ordinary infection.
- Your throat and glands on camera: the size and appearance of the tonsils, any coating, and swollen glands in the neck.
- Swallowing and breathing: whether swollen tonsils are making it hard to swallow saliva or breathe, which changes the urgency entirely.
- Signs pointing to the spleen or liver: abdominal discomfort, and any yellowing of the skin or eyes.
- Whether a blood test is needed: to confirm glandular fever and, where relevant, to check the liver and blood counts.
- Any antibiotics already taken: especially amoxicillin or ampicillin, and whether a rash followed, which is a strong clue.
- Your activities: contact sports, training or physical work that need pausing while the spleen may be enlarged.
When we treat glandular fever online, and when we refer you
We treat online: the typical illness in someone who is unwell but able to drink and swallow, where the job is to confirm the diagnosis, manage symptoms, give spleen and recovery advice, and set a clear safety net; uncertain sore throats where a blood test will separate glandular fever from a bacterial cause; and lingering fatigue that needs review to check recovery is on track.
We refer or redirect you: very swollen tonsils that threaten swallowing or breathing, which need same-day in-person assessment; any sign of a spleen problem, which is an emergency;[1] marked yellowing of the skin or eyes, or being unable to stay hydrated; and fatigue that is not resolving over an unusually long time, which needs in-person review to look for other causes. In those cases the consultation gets you to the right care quickly. Glandular fever is one of several overlapping cold and flu illnesses our doctors assess online, and it is easily confused with a high fever from other infections.
When to get in-person care
Get urgent in-person care if swollen tonsils make it hard to swallow saliva or breathe, if you cannot keep fluids down, or if the skin or whites of the eyes turn yellow. Call 112 immediately for sudden severe pain in the upper left side of the abdomen or the tip of the left shoulder, which can be a sign of a ruptured spleen, or for any serious difficulty breathing. A ruptured spleen is rare but life-threatening, and it is the reason contact sports and heavy lifting are paused during recovery.
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Listen · 23 Feb 2026 →How Mobi Doctor works
- Book a time that suits you: open daily 7am–11pm, often the same day, with the exact price, €47, shown before you pay.
- Speak to a licensed doctor about glandular fever: a private video consultation, from anywhere in Europe.
- Leave with your plan the same day: everything agreed on the call, and if treatment is right for you, the prescription follows straight away, sent to a pharmacy near you in most EU countries. If we can’t help you online, you get a full refund.
Frequently asked questions about glandular fever
Can an online doctor help with glandular fever in Europe?
Yes. Glandular fever cannot be cured with medicine because it is viral, so the doctor confirms the diagnosis, arranges a blood test where it helps, and gives clear advice on symptom relief, spleen safety and recovery. If a complication is developing, the doctor directs you to in-person care. Consultations are available across Europe.
How much does an online glandular fever consultation cost?
A video consultation costs €47. The exact price is shown before payment, and there is no subscription. Appointments run 7 days a week from 7am to 11pm, often the same day, with a licensed doctor by video from anywhere in Europe.
Why do antibiotics not work for glandular fever?
Glandular fever is caused by a virus, and antibiotics act only on bacteria, so they make no difference to it. Amoxicillin and ampicillin can also trigger a widespread rash in people with glandular fever, which is one reason a careful diagnosis matters before any antibiotic is used for a sore throat.
How long does the tiredness from glandular fever last?
The sore throat and fever usually settle within two to three weeks, but fatigue commonly lingers for several weeks afterwards, and in some people a lower level of tiredness lasts a few months. This is a normal part of the illness. Pacing your return to activity helps more than pushing through.
When can I play sport again after glandular fever?
Contact and collision sports, heavy lifting and vigorous exercise are avoided while the spleen may be enlarged, commonly for at least the first three to four weeks and sometimes longer. This lowers the small risk of a spleen injury. Your doctor advises on the right timing for your recovery before you return.
Do I need a blood test to diagnose glandular fever?
Often, yes. The symptoms strongly suggest it, but a blood test confirms glandular fever and can distinguish it from a bacterial throat infection. The doctor can advise whether a test is worthwhile in your case and arrange it, along with checks of the liver or blood counts where needed.
Is glandular fever contagious?
Yes. It spreads mainly through saliva, which is why it is nicknamed the kissing disease, and also through shared cups, cutlery and toothbrushes, and through coughs and sneezes. People can pass on the virus for a period even after feeling better, so avoid sharing drinks and utensils while you are unwell and recovering.
- Glandular fever (infectious mononucleosis), NICE CKS, Clinical Knowledge Summaries, reviewed 2024.
- Glandular fever, HSE, Health Service Executive (Ireland), reviewed 2024.
- Antimicrobial resistance, ECDC, European Centre for Disease Prevention and Control, 2023.
- Infectious mononucleosis, DermNet, DermNet New Zealand Trust, accessed August 2026.
- Steroids for short-term symptom control in infectious mononucleosis (glandular fever), Cochrane Review, Cochrane, 2015.
This page is for information only and is not a substitute for a medical consultation. Guideline links are provided for transparency; treatment decisions are made with your doctor.
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Listen · 23 Feb 2026 →Speak to a doctor about glandular fever today
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