Cons Internet on health.. Strain the eyes and the spine and joints. Internet addiction and mental illness such as depression ** Physical fatigue and exhaustion. ** Headaches and migraines (migraine). ** Insomnia and lack of sleep. ** Overweight. ** Strain the eyes and the spine and joints. ** Internet addiction and mental illness such as depression. Share This: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook