I have had a strange problem for more than a year. Whenever I see someone poke his nose, I feel hesitant, and I start to feel like I am not clean enough. For that reason, whenever I come back home from outside or someone else enters my room who I suspect has poked his nose, I have to clean my whole house, either by throwing water splashes all over the houses or by cleaning everything with a wet piece of cloth. If I do not do this, the area that I suspect came into contact with the material (or person suspected to poke his nose) will automatically start itching, and I feel like the affected area is burning and itching at the same time. Ultimately, it forces me to clean the house or my body by splashing water all over the house or by taking a bath. What is the problem?  Thank you!