The mold that drives this illness often can't be seen at all. A pipe leaks behind a wall, dries out, and leaves growth hidden inside the house with no stain and no smell. And it isn't the mold itself that harms your child. It's the biotoxins it releases which are tiny poisons that float through the air and settle into the body. For 1 in 4 people, these biotoxins cause the immune system to react and it can't shut off the response, so the body stays inflamed and stuck. It won't affect everyone in the house the same way. Most people clear these toxins just fine. That's why the house gets ruled out so quickly, when for some, it's the thing behind it all. For a child with PANDAS or PANS, this matters more than almost anything. A hidden mold load keeps the immune system worn down, so every infection on top of that hits harder and pulls them deeper into systems failure. Your home is either helping your child heal or working against it. Where biotoxins are most commonly found: - Water damaged homes, from roof leaks, plumbing leaks, or flooding - Bathrooms with poor ventilation, behind tiles, under sinks, around tubs and showers - Basements and crawl spaces that stay damp without a dehumidifier - Behind walls and under flooring where old leaks dried unseen - HVAC systems, air ducts, and air conditioning units that hold moisture - Around windows with condensation, drafts from cold air or past leaks - Front loading washing machines, dishwashers, and fridge drip trays - Damp carpets, rugs, and furniture that got wet and never fully dried - Ceiling tiles and drywall that were touched by any water leak - Attics with roof leaks or poor ventilation - Schools and older public buildings with a history of water damage - Cars that have had leaks, flooding, or damp carpets A simple dust test can help you detect if there's mold and point you in the right direction to building a clean environment. Many parents say that simply by moving to a clean home, their child gets significantly better. Others will need treatment because they're locked in cell danger response.