Erections can’t happen without proper blood flow. Normally when a man gets aroused, the arteries in his pelvis and penis relax and expand, bringing more blood to spongy tissues in the penis. At the same time, the valves in the veins close, trapping blood in the area and causing an erection. After the excitement ends, the vein valves open, the blood flows out, and the penis returns to its usual state.
Blood flow that’s not normal can cause priapism, an erection that lasts for more than 4 hours, is usually painful, and may happen without sexual arousal.
Can't get or keep an erection so you can have sex? That's what doctors call erectile dysfunction, or ED.
If it happens only occasionally, it's not likely to be serious. All men have problems with erections at some time in their lives.
If it slowly but consistently gets worse, there's probably a physical cause. This is generally what happens with chronic impotence.
If it happens suddenly but you're still stiff early in the morning and can get an erection while masturbating, that suggests your mind...
It can happen to males of all ages, including newborns.
There are two main types:
Low-flow or ischemic priapism: This type happens when blood gets trapped in the erection chambers. Most of the time, there’s no clear cause, but it may affect men with sickle-cell disease, leukemia (cancer of the blood), or malaria. If you don’t get treatment right away, it can lead to scarring and permanent erectile dysfunction (ED).
High-flow or non-ischemic priapism: This type is more rare than low-flow and is usually less painful. It often happens when an injury to the penis or the area between the scrotum and anus, called the perineum, ruptures an artery, which prevents blood in the penis from moving normally.
What Causes Priapism?
Sickle cell anemia: Scientists think about 42% of men with sickle cell disease will get priapism at some point.
Medications: Many men get the condition when they use or misuse some types of medicine. Drugs that may cause priapism include the depression treatment trazodone HCL (Desyrel), or chlorpromazine (Thorazine), which treats some mental illnesses. The pills or shots that treat ED may also cause priapism.
It’s rare, but priapism can happen because of cancers that affect the penis and prevent blood from flowing out of the area.
Getting a Diagnosis
If you think you might have priapism, you need to get medical care right away. Tell your doctor:
How long you’ve had the erection
How long your erections usually last
Any drugs, legal or illegal, that you’ve used
If the problem happened after an injury
Your doctor will review your medical history and do a thorough physical exam to figure out what’s causing your problem. He’ll check your rectum and belly for any signs of cancer. You may also need to see a urologist for more screening tests, including:
An imaging test called a color Doppler ultrasound, which shows how blood is flowing in your penis
An X-ray called an arteriogram that detects a dye your doctor injects into an artery