Children are susceptible to a wide range of illnesses, but a handful of them tend to come up again and again during childhood. Here's a look at the most frequently seen:

Common cold: Caused by viruses, colds are the most frequent illness in childhood. Symptoms typically include a runny or stuffy nose, mild cough, sneezing, sore throat, and sometimes a low fever.

Ear infections: These often follow a cold and occur when fluid builds up behind the eardrum and becomes infected. Young children may tug at their ears, have trouble sleeping, or seem more fussy than usual.

Strep throat: A bacterial infection caused by Group A Streptococcus, strep throat causes throat pain, fever, and swollen lymph nodes. Unlike a viral sore throat, strep usually requires treatment.

Stomach virus (gastroenteritis): Commonly called the stomach flu, this illness causes vomiting, diarrhea, stomach cramps, and sometimes fever. It's usually caused by a virus and tends to resolve within a few days.

Flu (influenza): More intense than a cold, the flu brings on fever, body aches, fatigue, cough, and sometimes vomiting or diarrhea. It spreads easily and can cause complications in young children.

Hand, foot, and mouth disease: A common viral illness in young children that causes mouth sores and a rash on the hands and feet. It's contagious but typically mild.

Croup: A viral infection that causes a distinctive barking cough and can make it harder to breathe. It most often affects toddlers and young children.

Pink eye (conjunctivitis): An infection or irritation of the eye that causes redness, discharge, and sometimes crusting. It can be caused by viruses, bacteria, or allergens.

When your child is sick, knowing which symptoms to monitor can help you decide when to stay the course with home care and when to reach out for guidance.

Signs that are usually manageable at home:

• Low-grade fever (ask your child's healthcare provider about their guidelines for your child's age)
• Runny nose and mild congestion
• Mild sore throat
• General fussiness or decreased energy
• Reduced appetite for a day or two
• Symptoms that warrant a call or visit to a healthcare provider:
• Fever in an infant under 3 months old, regardless of how high it is
• Fever above 104°F in any child
• A fever that lasts more than a few days or goes away and comes back
• Difficulty breathing, rapid breathing, or nostrils flaring
• Signs of dehydration, including no wet diapers for several hours in infants, sunken eyes, very dry mouth, or extreme lethargy
• A rash accompanied by fever
• Persistent vomiting or diarrhea lasting more than 24 to 48 hours
• A child who is very difficult to wake up or who is unusually unresponsive
• A stiff neck combined with fever and headache

When in doubt, it's always okay to call your child's provider to talk through what you're seeing.

For most common childhood illnesses caused by viruses, there isn't a treatment that makes the illness go away faster. What you can do is help your child feel as comfortable as possible while their body does its job.

Here are some supportive care tips:

• Encourage rest. Sleep is one of the most important things a sick child can do. A quieter day at home gives the body energy to fight the illness.
• Push fluids. Staying hydrated is especially important when a child has a fever, vomiting, or diarrhea. Water, diluted juice, and clear broths all help.
• Use a cool-mist humidifier. Adding moisture to the air can ease congestion and help with croup symptoms.
• Keep the nose clear. For young infants who can't blow their own nose, a nasal bulb syringe or saline drops can help clear congestion.
• Comfort and cuddles. Being close to a parent is genuinely soothing for a sick child. Don't underestimate the power of comfort.

Most common childhood illnesses spread through direct contact with an infected person, respiratory droplets from coughing or sneezing, or contact with contaminated surfaces.

Simple habits can make a real difference in reducing how often your child gets sick and how much they spread illness to others:

• Teach and model thorough handwashing with soap and water, especially before eating and after using the bathroom
• Encourage your child not to share cups, utensils, or towels with others
• Keep your child home from school or daycare when they have a fever, vomiting, or diarrhea
• Wipe down frequently touched surfaces at home, especially during illness outbreaks at school
• Make sure your child is up to date on recommended vaccines, which protect against several common and serious illnesses

This is one of the most practical questions parents face, and there are a few general guidelines that can help:

• Keep your child home if they have a fever of 100.4°F or higher. Most schools recommend waiting until they've been fever-free for at least 24 hours without fever-reducing medication before returning.
• A child with vomiting or diarrhea should stay home until they've been symptom-free for at least 24 hours.
• Pink eye that is causing significant discharge is usually contagious and warrants staying home until treated or resolved.
• A deep, persistent cough that disrupts others or suggests something more than a routine cold may also be a reason to keep them home.

When in doubt, your child's school or childcare center often has specific illness policies that can guide your decision.

Myth: A cold is caused by being cold or wet. Fact: Colds are caused by viruses, not temperature. Children get more colds in winter partly because they spend more time indoors in close contact with others.

Myth: Antibiotics will help my child get over any illness faster. Fact: Antibiotics only work against bacterial infections. Using them for viral illnesses, like colds or the flu, won't help and can contribute to antibiotic resistance.

Myth: If my child has a green runny nose, they need antibiotics. Fact: The color of nasal discharge isn't a reliable indicator of a bacterial infection. Green mucus is common during the normal course of a viral cold.

Myth: The flu is just a bad cold. Fact: Influenza is a distinct illness and can be significantly more serious than a cold, particularly in young children. It can lead to complications that require medical attention.