Most Commonly Reported Side Effects of Mould Exposure

Mould
October 01, 2025•2 min read

Mould is more than just an eyesore on walls, ceilings, or bathroom tiles. For many households, it’s a hidden health hazard that can cause a wide range of side effects. While not everyone reacts the same way, mould exposure has been linked to several commonly reported health issues that can impact everyday life.

Understanding these side effects is important — not just so you can recognise them, but also so you know when it’s time to take action to protect yourself and your family.

Respiratory Problems

One of the most frequent effects of mould exposure is trouble with breathing. People often report persistent coughing, wheezing, or a feeling of tightness in the chest. For those with asthma, mould spores are a well-known trigger that can worsen symptoms or bring on attacks. If these problems seem to get worse at home but ease up when you’re away, it could be a sign that mould is present in your living space.

Woman wearing protective mask coughing near black mould on wall, showing respiratory problems like coughing and wheezing caused by mould exposure.

Headaches and Fatigue

Many people exposed to mould report frequent headaches, brain fog, and a general sense of tiredness. These side effects are often overlooked, but they can significantly affect productivity and wellbeing. If you’re feeling unusually drained at home, mould exposure may be playing a role.

Man sitting on bed holding his head with pain, showing headache and fatigue linked to mould exposure at home.

Infections

Children, the elderly, and those with weakened immune systems are more prone to infections when mould is present. Sinus infections, ear infections, and chest infections are commonly reported. If infections keep coming back, it’s worth checking the home environment for hidden mould.

Microscopic view of harmful microorganisms, representing recurring sinus, ear, or chest infections caused by mould exposure.

Sleep and Concentration Issues

Some studies suggest prolonged mould exposure may interfere with sleep quality and focus. Parents often notice this in children who struggle with restlessness or have trouble concentrating on schoolwork.

Stressed woman sitting at desk with head in hands, symbolising sleep issues, poor focus, and brain fog linked to mould exposure.

Final Thoughts

The side effects of mould exposure can range from mild discomfort to serious health problems. If you notice ongoing symptoms in yourself or your family, your first point of call should always be a trusted health professional. They can provide proper guidance on your health while you take steps to investigate possible mould problems in the home.

At Mould Busters Australia, we specialise in identifying and removing mould safely, so you can protect your health and peace of mind. If you suspect mould is affecting your home environment, it’s best to act sooner rather than later.

Back to Blog