This topic tends to be squashed, avoided, shamed, and unnecessarily discarded. Addiction comes in many forms, not only to include drugs, alcohol and medication. Many experience their traumas surfaced through food addiction, shopping (retail therapy), caring for an excessive number of animals (perhaps a substitution for lack of love, self fulfillment, or unresolved trauma), relocation habits (vagabond mentality meant to escape from reality, a dull life, or lack of willingness to accept the world around oneself, to name a few), lots of sexual partners, heavy hobbies (addiction to fixing or collecting cars, antique collections, etc), among a plethora of other things. This is not to say one's passion or love of pets, cars or sex is always an addiction, but it is important for one to do the self reflection to distinguish the two. Reflection can look like:

Has my hobby become an obsession?

Why can't I stop buying shoes?