Mononucleosis mono — symptoms, treatment, talk to a doctor online

What is mononucleosis?

Infectious mononucleosis ("mono" or "kissing disease") is caused by Epstein-Barr virus (EBV) in most cases. Affects mostly teens and young adults. Characterized by severe sore throat, fatigue, fever, and swollen lymph nodes.

Recovery often takes 4–6 weeks; fatigue can linger months. Splenic enlargement creates rupture risk — avoid contact sports for 4 weeks minimum.

Do I have mononucleosis? Common signs

If most of these describe what you're experiencing, telehealth may be a good next step:

Severe sore throat with swollen tonsils Persistent fatigue, often profound Swollen lymph nodes — neck especially Fever Headache, body aches Sometimes rash (more common with amoxicillin) Loss of appetite Sometimes swollen spleen or liver Symptoms can persist weeks to months

Here's how it actually works

Tell us what's going on5-minute online intake covers your symptoms, history, and any photos.

A clinician reviewsLicensed in your state. Reviews your case and asks anything needed.

Rx to your pharmacyIf treatment is appropriate, the prescription goes to the pharmacy you choose.

What causes it

Epstein-Barr virus (EBV) — about 90%. Cytomegalovirus (CMV), HHV-6, or HIV can cause mono-like illness. EBV transmitted via saliva.

Is it contagious?

Yes — through saliva (kissing disease). Also shared drinks, utensils, kissing, oral sex.

The biggest pitfall is missing splenic rupture — no contact sports for at least 4 weeks even if you feel better, because the spleen can be dangerously enlarged.

Can it be treated online?

Routine mono is well-suited to telehealth — symptom pattern is recognizable. Severe complications (significant splenomegaly, hepatitis, airway compromise from massive tonsil swelling, hemolytic anemia) need in-person care.

How mononucleosis is treated

No specific antiviral. Supportive: rest, hydration, NSAIDs/acetaminophen, throat care. Steroids only for severe complications (airway compromise, hemolytic anemia). Avoid amoxicillin — causes rash in EBV. Avoid contact sports for 4 weeks minimum (spleen rupture risk).

Self-care while you wait

Rest as much as needed
Hydrate generously
Soft cool foods if throat is severe
NSAIDs or acetaminophen for symptoms
No contact sports or heavy exercise for 4+ weeks
Don't share drinks, utensils, towels, lipstick
Avoid kissing during active illness
Be patient — recovery takes weeks

When to skip telehealth and seek emergency care Severe upper abdominal pain (left upper quadrant), shoulder pain, dizziness or fainting — possible splenic rupture, emergency. Difficulty breathing from massive tonsil swelling, severe jaundice — urgent care.

How long does it last?

Acute symptoms 4–6 weeks. Fatigue can linger 3–6 months. Most people fully recover.

Frequently asked questions

How long am I contagious?

Virus is shed in saliva for months after illness. Active disease most contagious. Don't share drinks/kiss during illness.

When can I return to sports?

Minimum 4 weeks — longer for contact sports. Spleen rupture is the danger. Many physicians say 6+ weeks for contact sports.

Will I get mono more than once?

Once infected with EBV, you're typically immune. Reactivation is rare and usually mild.

Why no amoxicillin?

People with mono treated with amoxicillin develop characteristic rash in ~90%. Not a true allergy but characteristic enough to avoid the drug if mono suspected.

Can it become chronic?

Some develop chronic fatigue-like syndrome after mono. Most fully recover within 6 months.

This page is for general information only — not a substitute for individual medical advice. A licensed clinician reviews every intake submitted through PrescriberNow before any prescription is issued. If you're experiencing a medical emergency, call 911 or go to the nearest emergency room.

Mononucleosis
(mono)