3 Unexpected Symptoms of Mononucleosis

Many parents are familiar with the classic signs of mononucleosis, which include fatigue, fever, and a sore throat. But this viral infection can trigger other, less obvious symptoms that can catch families off guard. Understanding these hidden warning signs can help you respond faster and support your child’s recovery more effectively.

At Hibari Family Medical in Edgewater, New Jersey, our team provides exceptional pediatric care and is here to guide you through everything from everyday illnesses to more complex infections, such as mono. When your child isn't feeling well, you need answers and expert support to help them recover comfortably.

#1: Watch for signs of spleen enlargement

As your child's immune system ramps up to fight off the mononucleosis virus, the spleen can become swollen and sensitive. Located in the upper left portion of the abdomen, an enlarged spleen is more prone to injury during physical activities. 

If your child complains of sharp pain in that area, especially after running or playing, it’s essential to seek medical evaluation right away. Because of this risk, kids recovering from mono should temporarily avoid sports and other activities that could cause abdominal impact. Giving the spleen adequate time to heal reduces the chance of more serious complications.

#2: Dehydration is a genuine concern

Thanks to sore throats, fatigue, and low appetites, children fighting mono often eat and drink less. Fever and sweating can also accelerate fluid loss, leading to dehydration. Keep an eye out for symptoms such as dry lips, sunken eyes, dark urine, dizziness, and reduced bathroom trips. 

Encouraging regular fluid intake, such as water, electrolyte beverages, broths, or hydrating popsicles, can help maintain hydration. If your child shows signs of moderate to severe dehydration, don’t wait. Our team at Hibari Family Medical can assess their needs and provide supportive care to help them recover.

#3: Watch for breathing difficulties

During the course of mono, it’s common for lymph nodes and tonsils to swell significantly. In some cases, this swelling can narrow the airway, causing trouble with breathing or swallowing. If your child seems to struggle with breathing, sounds hoarse, or can’t easily catch their breath, it’s time to get medical help. 

Depending on the severity, treatments such as corticosteroids may be prescribed to reduce airway swelling. Severe cases might need evaluation by an ear, nose, and throat (ENT) specialist to ensure breathing is not dangerously impaired.

Supporting recovery at home

Recovering from mononucleosis can take several weeks, and during that time, rest is crucial. Make sure your child gets plenty of sleep and avoids overexertion, even if they start to feel a little better. 

It's also vital to offer nutrient-dense foods like soups, smoothies, and soft fruits that are easy to swallow and packed with vitamins. Kids may feel frustrated with the slow pace of recovery. Remind them that taking it easy now will help them get back to their regular activities sooner and stronger.

Trusted care for your child's recovery

Mononucleosis can be unpredictable, but having the right medical support makes a big difference. At Hibari Family Medical, we partner with parents to monitor symptoms, manage complications, and help children recover with confidence.

If your child is showing signs of mono or facing a tough recovery, contact our office today to schedule a visit. Compassionate, expert care is just a phone call away.