There is no way you can care for your overall and sexual health without maximum testosterone levels in your body. Testosterone is inseparable from men. It is the reason why men what they're. The aggressive behavior of yours, sex drive, lean and muscular body etc., are attributes of this main male hormone. Not just this, furthermore, it influences the moods levels of yours. No question, men with low testosterone start to be irritable and also experience mood swings.  
Injections or go now (great post to read) testosterone shots appear to be an easy solution to counter low testosterone levels in your body. It is essential to note that testosterone production in your body starts off slowing down at aproximatelly 1 1.5 % per year once you hit 30 and this results in a lot of behavioral changes and body in men.  
Reduced energy, fatigue, low libido, erectile dysfunction, weaker bones and osteoporosis, mood swings, sleeping difficulties etc., are several of the consequences and signs of low testosterone in the body of yours.  
Testosterone shots or injection therapy can boost your T-levels quickly and most males adore this quick rush of testosterone. But, your T levels begin declining 4-5 times after you have had those injections.  
Not only this, such injection therapy could be quite painful. Actually, most males report this pain in the injection filed can last for weeks. There can easily be a number of other side effects that include: