How Much Masturbation Is Over-Masturbation?
Well, for starters, over-masturbation would be several times a day. Some doctors even recommend that men keep their ejaculation (not masturbation) frequency down to two or three times a week. That leads to the conclusion that sexual activity can be experienced more often if a man learns how to achieve orgasm without ejaculation, which is one of the tantric sex principles. According to “old knowledge”, achieving orgasm without ejaculation stores bioenergy and makes the penis firmer, hence your erections last longer and the volume a man ejaculates is larger. 
But we would agree that masturbation and its frequency also depends on a person's age and period in life. It is normal that a 16-year old masturbates more often than 40-year old. Isn't it? A 16-year old just started to show affection for his (all of a sudden erect) part, while a 40-year old is "over" it. (We are talking about frequency).
Some people relax this way, by masturbating. Well, here on SteadyHealth, we are not really sure whether this is the best way to relax. Guess not. Maybe occasionally, but if you simply don't feel horny and if you feel tense, rather take a walk or go play basketball than developing a behavior that could potentially lead to addiction.
So, What About The Effects Of Over-Masturbation?
Internal body temperature is a bit higher than external body temperature. Internal body temperature increases with masturbation; this is the reason you feel more hot or sometimes even sweaty after masturbating. Considering that, we found the following information: when a person ejaculates, a “peristaltic movement of absorption takes place and by effect of the emptiness, the seminal vesicle tries to fill and humid air is absorbed through the penis which is later absorbed from the seminal vesicle to the lymphatic system, arriving at the brain producing a thermal shock and cold spaces between the cerebral neurons and cells and this affects cerebral, physical and nervous normality”. 
Well, the same thing happens when having sex and not ejaculating in a partner, but using the pull out method or removal method (which is very popular among steady couples), and not one source mentions that. Later on, the same source mentions that the seminal vesicle absorbs air, which is transferred into the brain, and this may lead to stupidity and insanity. We think this is nonsense! Simply ask yourself — could you say that lower a IQ could result as a side effect of masturbation, and do you feel more stupid or more insane before or after masturbation?! 
Sperm contains DNA, which is a carrier of the heredity genetic code, and RNA, which contains enzymes, proteins, glucosides, lecithin, calcium, phosphorus, biological salts, testosterone, etc. However, sperm is not the only substance in our body that contains DNA by any stretch of the imagination, or RNA for that matter. When ejaculation happens, a very small percentage of these components (enzymes, proteins, glucosides, lecithin, calcium, phosphorus, biological salts, testosterone) are eliminated from the body. For example, when extracting calcium from the body, one could cause him/ herself fatigue and pain in the bones. But we all know calcium (and all other components) are easily substituted with food. Actually, it is normal to extract 'old' components and replace them with new ones.
Abnormally high levels of sex hormones cause brain and adrenal glands to perform an excessive dopamine-norepinephrine-epinephrine conversion. In other words, there is a big change of body chemistry when a man or woman practices over-masturbation. 
Hmm... is something wrong with your body chemistry? Well, actually not — if there is a balance. But if there is no balance, some other symptoms might occur. We are still talking about over-masturbation, not masturbation in general!
Another source points out that people who over-masturbate could experience problems with concentration and memory, which is supposedly a clear sign of “being over drained of acetylcholine”. According to some sources, over-masturbating can also drain the motor nerves, neuromuscular endings, and tissues of acetylcholine and replace it with too much stress adrenalin which is where absentmindedness, memory loss, lack of concentration, and eye floaters come from. 
They also point that over-masturbation may be linked to male pattern baldness. Male baldness is namely directly related to DHT (dihydrotestosterone), just like the production of DHT is related to sex and masturbation. If a person over-masturbates (over-ejaculates) testosterone is converted into DHT. Following that, high levels of DHT overload the body, causing baldness. This thesis needs more debate! We all know baldness is hereditary, and that older people who didn't use to be bald eventually start losing their hair. What about their DHT levels?
We at SteadyHealth say these are myths! But they are not the only myths about masturbation — here are some others: masturbation leads to blindness, baldness, impotence, mental illness. Another myth is a school of thought that masturbation can permanently reduce libido, sexual performance, and the quantity or quality of semen. All myths! And not only that: Masters and Johnson (physicians who pioneered the field of sexuality) have demonstrated no negative short-term or long-term medical health effects from masturbation. 
However, there is a psychological/psychical aspect to masturbation. For example, if masturbation occurs in a marriage as a substitute for sex, it could potentially damage the self-esteem of the partner not involved. However, it is not masturbation – it is another problem: lack of communication.
Over-masturbation could also lead into addiction or obsession, which may consequently lead to diversion of income toward sex merchandises (all sort of sex toys, pornography...) and may limit a person's ability to participate in other (social) activities.
It is also true (and you might already experience that) that frequent and vigorous masturbation (again: over-masturbation) may produce skin irritation, skin abrasions, or even superficial bruising, as well as sometimes temporary discoloration of the skin. The condition improves with time, if of course not masturbating. 
You'll be more able to develop stronger and satisfying sexual relationships. Masturbation may even be helpful to reduce stress (although we also recommend other relaxation techniques). And most of all, it is better to masturbate than to play around with no protection: masturbation eliminates the potential for the transmission of sexually transmitted diseases. The same is true for pregnancy.