Internet addiction is an impulse control disorder that doesn't involve use of drugs but the effect is same. Both gives you enjoyment but like a slow poison it slowly start to overtake you. The main reason of people getting addicted because it start with enjoyment, the more you enjoy, the less you get.
Symptoms of Internet addiction include Feeling guilty, ashamed, anxious, or depressed as a result of online behavior, Failed attempts to control behavior, Neglecting sleep to stay online, Weight gain or loss, backaches, headaches, carpal tunnel syndrome, Withdrawing from other pleasurable activities.
Based on real life activities here is some comics that every internet addict can relate -
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