Does my house make me sick?

What people notice first

The phrase people search is blunt because the feeling is blunt. You are clearer in the car than in the kitchen. Your head is heavier on Sunday night than on a Saturday spent out. A partner shrugs. None of that proves a contaminant, and none of it means you are imagining a room.

Indoor air problems that show up in ordinary homes are usually ordinary: damp materials, a bath fan that dumps into the attic, a return duct pulling crawlspace air, a washer that never dries, combustion appliances without a working carbon monoxide alarm. The EPA treats moisture as the root of most residential mold problems. Start there, not with a scare headline.

A pattern worth writing down

For two weeks, note the day, where you were, and one sentence on how you felt. Include nights away from home if you have them. You are looking for a repeatable difference, not a perfect graph.

Bring that log to a clinician if symptoms are significant. Say that you are not asking them to diagnose the house. You want medical causes considered while you fix moisture and ventilation. Trouble breathing, chest pain, or symptoms that are getting worse are not a weekend project.

What to change in the building

Three moves cover most of the houses we built ClearNest for. Seal return leaks so the furnace is not sharing crawlspace or attic air. Get indoor humidity under about 50% and stop active leaks. Walk the rooms with a camera so the next month isn't a blur.

Testing the air before you have done those things mostly buys a number without a plan. If you can see growth larger than about 10 square feet, or the growth is inside the HVAC system, or the water was sewage, hire a professional. EPA's brief guide for homeowners draws that size line for a reason.

• Better away from home, worse in a specific room: inspect that room for water, then the duct that serves it.
• Worse when the heat or AC starts: smoke-test the returns.
• Worse in one season: humidity and condensation, not a new personality.

Especially if you are a woman who has been dismissed

Indoor contaminants and hormones can overlap. Some mycotoxins are studied as endocrine-active compounds, and women report environmental sensitivity more often. Roughly 1 in 4 people — not women alone — carry HLA-DR types linked in research to slower clearance of certain biotoxins. That is not a gene you can claim from a blog, and it is not required to justify drying a wet wall.

You are allowed to fix the house and ask for medical care. Those are not competing loyalties.