My mother has been seeing bugs (she calls fleas) for over two years. She vacuums constantly and washes clothes continually. Her house is immaculate due to her excessive cleaning. We have even disposed of her complete wardrobe and started over again with he clothing protected by plastic bags and footlockers.
Every exterminator in the area has been to her house. They end treating her house at her insistence after telling her they do not see anything. Nothing shows up on bug traps. The exterminators will not return to her house.
She has scratched herself raw in many areas of her body. She swears she is not hallucinating and will not seek medical help because she is embarrassed by the idea that she has bugs. I am at the end of my rope here since I can not get her to tell her medical or eye doctor.