The causes of addictions are not specific.Anything that gives the body so much pleasure that one can't resist to some varying extent, he's said to be addicted to it.
SYMPTOMS(1). A craving desire to do the activity
(2.). Failed attempts to stop that activity
(3). Substance abuse
(4). Compulsive behavior
TREATMENTS.just like depression, addiction can be treated. here are a few steps in combating addiction
(1)withdrawal from the addicted substance/activity
(2) Behavioral counseling.
(3). staying away from what you know would trigger the feeling (e.g bad peer influence)
(4). detoxification(in terms of drug addiction)
(5). evaluation and treatments for co-occurring mental health issues such as anxiety or depression