Pediatrician examining child’s abdomen during visit at a clinic in San Diego, CA

Common Childhood Illnesses & When to See a pediatrician

Understanding Common Childhood Illnesses in San Diego

As a parent, nothing tugs at your heartstrings quite like seeing your little one unwell. Whether it’s a sudden fever in the middle of the night or a cough that just won’t quit, illness is an inevitable part of growing up. While most childhood sicknesses are mild and pass with a bit of rest and tender loving care, it can be stressful trying to determine if your child is dealing with a simple bug or something that requires professional medical attention. Navigating the world of runny noses, fevers, and tummy aches is a rite of passage for every caregiver. Understanding the basics of common childhood illnesses can empower you to make informed decisions about your child’s health. This guide breaks down the most common ailments you’re likely to encounter during the early years and provides clear indicators on when it’s time to call your pediatrician at OpSam Health.

Pediatrician examining child’s abdomen during visit at a clinic in San Diego, CA

Top Five Childhood Illnesses

Children are naturally curious explorers. They touch everything, share toys, and interact closely with their peers at school or daycare. Unfortunately, this also makes them prime targets for germs. Their immune systems are still developing, making them more susceptible to infections than adults. While there is a wide range of potential ailments, most pediatric visits revolve around a handful of usual suspects. Familiarizing yourself with these can help you stay calm and prepared when symptoms strike. The five most common childhood illnesses include:

  • Common Cold: A viral infection of the nose and throat.
  • Ear Infections: Inflammation of the middle ear, often following a cold.
  • Influenza (The Flu): A contagious respiratory illness caused by influenza viruses.
  • Stomach Viruses (Gastroenteritis): Often called the “stomach flu,” causing vomiting and diarrhea.
  • Respiratory Syncytial Virus (RSV): A common virus that causes cold-like symptoms but can be serious for infants.

What Is the Common Cold?

It’s called “common” for a reason. According to the CDC, adults have an average of 2-3 colds per year, but children can have even more. The common cold is a viral infection of the nose and throat in babies. Congestion and a runny nose are the main indicators. Babies and young children are especially susceptible to the common cold, in part because they’re often around other older children. Also, they haven’t yet developed immunity to many common infections. While the first year of life might seem like one long sniffle, rest assured that most colds are harmless and clear up on their own within a week or two. Symptoms usually start with a runny nose that might be clear at first but can turn thicker and yellowish-green. Other signs include sneezing, a mild fever (usually lower than 101°F), reduced appetite, and occasional coughing. Treatment is mostly supportive—keep your child hydrated, use a humidifier to moisten the air, and use saline drops to help clear nasal congestion.

Signs of an Ear Infection

Ear infections are a frequent complication of the common cold. Fluid can get trapped behind the eardrum, creating breeding ground for bacteria. This is incredibly common in young children because their Eustachian tubes (the tubes connecting the ear to the throat) are shorter and more horizontal than in adults, making drainage difficult. Since babies and toddlers often can’t verbalize pain, you have to look for non-verbal cues. If your child has recently had a cold and suddenly becomes fussy again, an ear infection might be the culprit. Watch for these key signs:

  • Tugging or pulling at the ear: This is a classic sign of discomfort.
  • Crying and irritability: This is especially noticeable when lying down, as the change in pressure causes more discomfort.
  • Difficulty sleeping: Pain often worsens at night.
  • Fever: Often accompanies the pain.
  • Fluid draining from the ear: A sure sign of infection.
  • Balance issues: The inner ear plays a crucial role in controlling balance, so an infection can lead to clumsiness.
  • Hearing difficulties: Fluid buildup can muffle sounds, causing your child to not respond to quiet noises.

Influenza Symptoms

Influenza, commonly known as the flu, strikes more severely and rapidly than a cold. It is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccine each year. Distinguishing between the flu and a bad cold can be tricky, but the onset is usually the most significant clue. A cold comes on gradually; the flu hits you like a truck. Symptoms typically include:

  • Sudden, high fever: Often over 101°F.
  • Chills and shakes: Feeling freezing despite being warm.
  • Body aches: Muscle pain is a very common symptom.
  • Extreme fatigue: Your child may not want to get out of bed to play.
  • Headache: Often severe.
  • Dry cough and sore throat.
  • Vomiting and diarrhea: While more common in children than adults, this isn’t the primary symptom (unlike stomach viruses).
Pediatrician checking young child during visit at a clinic in San Diego, CA

How to Tell If Your Child Has a Stomach Virus

Viral gastroenteritis is an intestinal infection marked by watery diarrhea, abdominal cramps, nausea or vomiting, and sometimes fever. It’s often referred to as the “stomach flu,” but it’s not actually related to influenza. It typically spreads through contact with an infected person or by ingesting contaminated food or water. The main danger with stomach viruses is dehydration, as children lose fluids quickly through vomiting and diarrhea. Look out for these symptoms:

  • Watery, non-bloody diarrhea
  • Abdominal cramps and pain
  • Nausea and vomiting
  • Occasional muscle aches or headache
  • Low-grade fever

What Are the Symptoms of RSV?

Respiratory Syncytial Virus, or RSV, is a common virus that typically causes mild, cold-like symptoms in adults and older, healthy children. It can be more serious in young babies, especially those in certain high-risk groups. In fact, RSV is the most common cause of bronchiolitis (inflammation of the small airways in the lung) and pneumonia in children younger than 1 year of age in the United States. RSV season typically overlaps with flu season. While it starts like a cold, parents need to monitor breathing closely. Symptoms include:

  • Congestion or runny nose
  • Dry cough
  • Low-grade fever
  • Sore throat
  • Sneezing
  • Headache

In severe cases, symptoms can escalate to wheezing, rapid breathing, or difficulty breathing (you might see the child’s rib cage caving in as they try to inhale).

Know When to See a Pediatrician

While many of these illnesses can be managed at home with rest and hydration, there are specific instances when professional medical advice is necessary. At OpSam Health in San Diego, we believe that peace of mind is part of great healthcare. Never hesitate to reach out if your parental instinct tells you something isn’t right. You should seek medical attention if:

  • High Fever: For babies under 3 months, any fever over 100.4°F warrants a call. For older children, a fever lasting more than 3 days or rising above 104°F requires attention.
  • Difficulty Breathing: If your child is wheezing, breathing rapidly, or struggling to catch their breath.
  • Signs of Dehydration: No wet diapers for 6-8 hours, dry mouth, crying without tears, or a sunken soft spot on an infant’s head.
  • Persistent Symptoms: A cough that lasts more than two weeks or ear pain that doesn’t improve after a couple of days.
  • Unusual Lethargy: If your child is hard to wake up or isn’t interacting as usual.
  • Severe Pain: Intense stomach or ear pain that isn’t relieved by over-the-counter medication.

Partnering in Your Child’s Health

Seeing your child sick is never easy, but being equipped with knowledge about common childhood illnesses makes the experience much more manageable. Most fevers will break, coughs will subside, and energy levels will return to their chaotic normal. Remember, you know your child best. If symptoms seem severe, unusual, or simply worrying, OpSam Health is here to support families across San Diego. By understanding the signs and knowing when to act, you are already providing the best possible care for your little one. Contact us today for any concerns.