Obsessive-compulsive disorder (OCD) is a relatively common mental disorder, with the core manifestations of obsessive-compulsive thinking or obsessive-compulsive behaviors, which may also co-exist.
Of these, obsessive thinking refers to recurring, unnecessary, intrusive thoughts, doubts or impulses in the mind. Common manifestations include obsessive-compulsive doubt, such as always suspecting that a door or window has not been closed, always doubting whether what you say is correct, etc.; obsessive-intentional, such as not daring to carry the child to the window for fear that you will throw the child down; obsessive-recollective, such as repeatedly recalling an experienced event, and needing to recall it from the beginning if interrupted; and obsessive-contemplative, such as repeatedly thinking about problems that lack practical significance.
Compulsive behaviors are recurring stereotypical behaviors, and most stereotypical behaviors are involuntary. Common manifestations include forced cleaning, such as repeated hand washing and washing clothes, washing hands up to dozens or even hundreds of times a day, bathing time up to three or four hours, etc.; forced inspection, such as closing the door or gas valve after the repeated confirmation of more than ten times, etc.; forced counting, such as repeated counting of utility poles or floors, etc.; compulsive ceremonial actions, such as even if you are late for work, you will still be a few dozen floor counting clearly before departure The first is to make sure that you have a good understanding of what you are doing and how you are doing it.