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How Does Mold Affect Children's Health?

Last updated October 25, 2026

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The short answer

Why Children Are More Vulnerable

Children's immune systems are still developing, and their airways are narrower than adults'. When mold spores are breathed in, they can cause inflammation in the nose, throat, and lungs. This often shows up as sneezing, a runny nose, or itchy eyes. In humid climates, indoor mold can grow unnoticed behind walls or under carpets, making exposure more likely.

Young children also tend to put hands and objects in their mouths, which can transfer mold spores from surfaces to their digestive tract. While most reactions are respiratory, some children develop skin rashes after touching moldy materials. The effects depend on the type of mold, the amount of exposure, and your child's individual sensitivity. If you notice symptoms, keep track of when they occur and where your child spends time.

Common Symptoms to Watch For

Symptoms of mold exposure in children can range from mild to severe. Mild reactions include coughing, wheezing, nasal congestion, and throat irritation. Some children also experience headaches, fatigue, or difficulty concentrating, especially if they are exposed during sleep. These symptoms can be similar to colds or seasonal allergies, which makes it easy to overlook mold as the cause.

  • Coughing or wheezing
  • Nasal congestion or sneezing
  • Red, itchy, or watery eyes
  • Skin rash or eczema flare-ups
  • Headaches or fatigue
  • Worsening asthma symptoms

How Mold Grows in Your Home

Mold needs moisture and organic material to grow. Common sources include leaking pipes, roof leaks, flooded basements, and poor ventilation in bathrooms or kitchens. In a humid climate with warm summers, indoor humidity can stay high, especially in areas like basements and crawl spaces. Even a small leak behind a wall can create a hidden mold problem.

You might notice a musty odor, dark spots on walls or ceilings, or peeling paint. However, mold can also grow in places you cannot see, such as inside air ducts or under flooring. If you suspect mold but cannot find the source, a moisture mapping service can help identify damp areas. Acting quickly to dry wet materials and fix leaks reduces the chance of mold taking hold.

What You Can Do at Home

Start by controlling moisture. Fix plumbing leaks promptly, dry wet carpets and furniture within 24 to 48 hours, and use exhaust fans in bathrooms and kitchens. Keep indoor humidity between 30 and 50 percent by using a dehumidifier if needed. In warm, humid summers, running a dehumidifier in the basement can make a difference.

Clean small areas of mold with soap and water or a mild bleach solution, but never mix cleaning products. For larger areas (more than about 10 square feet), consider hiring a mold professional. Also, remove porous materials like drywall or carpet that cannot be thoroughly dried. If your child has asthma or allergies, it may be safest to leave the cleanup to professionals to avoid stirring up spores.

When to Call Local Water Damage Pros

If you find mold after water damage, the underlying moisture problem must be addressed first. Local water damage pros can handle structural drying and dehumidification to remove excess moisture from walls, floors, and ceilings. They also perform emergency water extraction after floods or pipe bursts, which limits mold growth. These services help create an environment where mold cannot thrive.

For hidden mold, a water damage inspection can locate moisture sources using leak detection and moisture mapping. After the source is fixed, damaged drywall or flooring may need removal and replacement. If you live in Detroit, keep your shutoff valve location written down to minimize water damage in case of a burst pipe. Addressing moisture early protects your child's health and your home's structure.

  • Water damage inspection to find hidden moisture
  • Emergency water extraction after a flood or leak
  • Structural drying and dehumidification for walls and floors
  • Leak detection to stop ongoing water intrusion
  • Drywall repair or flooring removal if materials are damaged
  • Flooded basement cleanup to prevent mold growth

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Frequently asked questions

Can my child get sick from mold even if they have no allergies?

Yes. Even without allergies, inhaling mold spores can irritate the airways and cause coughing or congestion. Some molds produce toxins that may lead to headaches or fatigue. The effect depends on the type and amount of mold, as well as your child's overall health. If symptoms persist, see a doctor.

How quickly can mold start growing after a water leak?

Mold can begin growing within 24 to 48 hours after materials become wet, provided there is a food source like drywall or wood. That is why it is important to dry out wet areas quickly. If you have had a leak, act fast to remove standing water and increase air circulation.

Should I try to remove mold myself or call a professional?

For small patches (less than 10 square feet), you can clean with soap and water. But if the area is larger, or if mold is in the HVAC system, or if your child has asthma, call a mold professional. They have the right equipment to remove mold safely without spreading spores.

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