The actual causes or cause of Kleptomania is not really known but people with other mental disorders such as anxiety, substance use disorders, or personality disorders as well as bipolar disorders are typically the ones that have Kleptomania which is an urge to steal things even though they don't really want to be a thief.
Kleptomania is a serious thing because it can land the person in jail or prison if they steal things and if you or someone has Kleptomania you should see a therapist about it.
Although there's no cure for Kleptomania talk therapy can help curb your urge or desire to steal things which is a good thing because you don't want to land in jail or prison or be arrested for stealing things.
If you're caught stealing things and are arrested the judge won't be able to dismiss your case just because you've been diagnosed with Kleptomania.
Kleptomania cannot be used as a defense in cases of stealing even if you're diagnosed with Kleptomania.