 [ Symptoms ] problems keeping an erection i am an 18 year old male i weight 133 pounds and i am 58 i have problems keeping an erection it will get hard but it gets soft rather quickly without stimulation like a few seconds when it is hard it usually stays a sort of mostly hard but still soft penis i smoke cigarettes and marijuana but not to the extent where it would cause major damage i exercise 2 3 times a week and eat healthy although i do indulge in some junk food could i really have erectile disfunction at my age [ Disease ] the medicines you are taking will not be helpful for you start antibiotics immediately preferably broad spectrum ones like azithromycin should be used taking multivitamin and anti inflammatory tablets will be helpful local oral antiseptic gels should be used