The blood vessels under the foreskin are mostly considered to be superficial veins within the foreskin, which is a normal physiological phenomenon, if accompanied by other discomforts, it is recommended to further go to the hospital for examination.
In general, because the male foreskin between the inner plate and outer plate will contain lymphatic vessels, superficial veins and other vascular structures, so some of the thicker blood vessels may appear curved, protruding phenomenon, especially after erection due to blood vessel congestion may lead to a more pronounced protruding, is generally regarded as a normal physiological phenomenon, do not need treatment.
In addition, if more exercise or more frequent masturbation may lead to blood vessel bulge obvious, usually do not appear other clinical symptoms, in most cases with age, the blood vessel bulge under the foreskin will gradually become shallow or disappear, is also a normal physiological phenomenon.
Therefore, it is mostly considered to be superficial venous bulge, if accompanied by other discomforts, it is recommended to go to the hospital for further examination.