Hi. Thanks for posting your concern at HCM Although masturbation and under eye dark circles don t have any direct co-relation with each other but lack of proper sleep, sitting for long hours on computers, and lack of good diet do have a role. Over-indulgence in masturbation could develop into a kind of addiction, which can result in deviation from normal routine like regular 6-8 hours of sleep and not having meals or skipping meals etc. I would advice that you consult a specialist e.g a psychologist or a psychiatrist who would help you come out of this habit. Masturbation is ok, but overindulging in it at the expense of other activities can be a disorder. Excess of everything is bad!! take care regards