There are blood vessels on the foreskin, circumcision basically will not affect, only need to pay attention to avoid erection and infection after surgery.
There are superficial penile veins and other blood vessels on the foreskin, only that some of them may be more obvious because of varicose veins, etc. However, it will not affect the circumcision, and you only need to pay attention to stopping the bleeding during the operation.
After circumcision, you need to avoid erection as much as possible to prevent the incision from opening up after erection, which may lead to non-healing, delayed healing or infection, etc. Meanwhile, you need to pay attention to changing medicine and gauze regularly to avoid infection of the incision. If the operation is performed with a circumciser, the titanium nail will gradually fall off by itself after two weeks, and no special treatment is needed.
To summarize, if there is any discomfort, consult a doctor in time.