Erectile dysfunction (ED) is defined as the inability to get an erection or to keep an erection firm enough for sexual activity. By this definition, it is possible to have ED but still be able to masturbate with orgasm. And while the chance of having ED increases with age, it is still very possible to have ED as a teenager.

So what are the causes of ED? This will be different as you get older (and/or develop health conditions that impair blood flow like diabetes or high blood pressure), but here are some of the most common risk factors for developing ED in teens and young adults:

• Obesity

• Smoking

• Sitting for long periods of time (like watching a lot of TV)

• Frequent and prolonged bike-riding

• Peyronie’s (or a problematic bend in the penis)

• Heavy use of alcohol or drugs

• Depression or anxiety

• Certain types of antidepressants

• Performance anxiety

• Relationship problems