Erection self-test

Alternative names:

nocturnal penile tumescence (NPT) stamp test

Normal values:

During at least one of the nights, the ring of stamps is broken between any two stamps.

What abnormal results mean:

If the stamps are broken it may suggest that the erection problem is the result of psychological causes. If the stamps are not broken on any of the 3 nights it may indicate that the erection problem is related to physical conditions or medications (see impotence). The health care provider should be consulted.