Penis pumps, sometimes known as "vacuum erection devices," are usually thought to be safe but might not be appropriate for some patients.

Penis pumps or vacuum erection devices (VEDs) are commonly used as a non-invasive treatment for erectile dysfunction. They work by creating a vacuum around the penis, which draws blood into the erectile tissue, causing an erection. However, while VEDs are generally considered safe, they may not be appropriate for some patients, especially those with certain medical conditions.

For example, men with bleeding disorders or those taking blood-thinning medications should avoid using penis pumps as they can increase the risk of bleeding or bruising. Men with a history of priapism, a painful and prolonged erection that can damage the penis, should also avoid using VEDs. Additionally, men with certain anatomical abnormalities of the penis, such as Peyronie's disease, should use caution when using VEDs.

It is important to note that penis pumps should only be used under the guidance of a healthcare professional. They should be used according to the manufacturer's instructions, and any discomfort, pain, or bruising should be reported to a healthcare provider immediately.

Using a penis pump or any external rigidity device may make penile diseases like priapism worse, according to the Food and Drug Administration (FDA)Trusted Source.

Mild bleeding beneath the skin's surface can also result from too much air pressure in the cylinder. This is why you might not be a good candidate for penis pumps if you:

• Have a blood condition
• Take blood thinners if you have a history of blood clots
• Your penis could get bruised, numb, or cold if a cock ring is excessively tight or kept on for too long.