Is it obligatory to purify oneself from minute impurities that are invisible to the naked eye, such as pinheads and fly legs, or those that transfer through moisture? And do things that are perceptible and imperceptible have the same ruling? Is what the psychologist said, that treatment necessitates prayer no matter the mistake, correct? And did the Messenger and the Companions purify themselves from minute impurities that are invisible to the eye? How did they guard against urine splashes? And is it obligatory to wash everything touched by family members with wet hands after they have touched impure areas?

The treatment for obsessive thoughts is to ignore them and not pay them any attention. The default state of things is purity. If you are certain something is impure, purifying it is easy by pouring water over it. For istinja (definition)' (ablution after relieving oneself), the predominant assumption that the impurity has been removed is sufficient. Relieve yourself and perform istinja' normally, without exaggeration. Perform wudu' and pray normally, and do not succumb to the devil's whisperings. It is permissible to act upon the opinion of those who overlook minor impurities. Continue with your treatment and follow the doctor's advice.