I think age is irrelevant. Life is difficult at all ages, thus reflected by the initiation of certain coping mechanisms. Whether it be self harm, drink, drugs whatever. I think popular opinion towards self harm doesn't help. It's not the reserve of teenagers on tumblr or the characters on whatever young adult show currently in demand. It's reached epidemic proportions. So you're far from alone. I just hope you can be one of the few who makes a choice in wanting something that actually works. Because self harm clearly doesn't. It's good at creating that illusion, of delaying any immediate and far worse action but like drinks and drugs it promises and lot and delivers very little. I think we deserve better than that. I wish you the best in finding your solution to this widespread problem