I found out recently that i have low testosterone level. what issues can this create?

Nothing unless . . .: Low testosterone is just a number. We don't treat numbers (aside from blood pressure, cholesterol & glucose). Instead, we treat patients. So if you're tired, fatigued, fat w/o muscle despite diet & exercise, no sex drive w/erectile dysfunction, can't think clearly, and depressed, you might have hypogonadism which might be cured by increasing your t (beware some rx might affect sperm production).