Is OCD caused by Satan ?

OCD is a diagnosable medical condition and as is the case with several medical conditions finding the exact cause is something that researchers are still grappling with. A summary of posited causes can be found in this article. As such, the author opines, that it would be wrong to attribute Satan (shaitaan) as the cause of OCD, and is a grave error because that poses negative connotations such as ‘Satan targets us all, why are you being weak and giving up into Satanic intrusion’.

• The exact cause of OCD is unknown.
• Satanic Intrusions (Waswaas) are part of daily life and we all get thoughts that we found alien but at the same time know they came from within us
• For muslims, It is important to recognise that OCD has characteristics similar to Satanic intrusions (Waswaas) and as such they can use some of the strategies that they use to overcome Waswaas to keep OCD in check

A more detailed answer can be found here