Blisters are generally referred to as blisters, and blisters on the foreskin are usually not syphilis, which can be caused by genital herpes.
Patients with syphilis may have skin symptoms such as hard chancre, syphilis rash, nodular syphilis rash, syphilitic dendritis, etc., but patients seldom have the manifestation of blisters on the foreskin, so patients with blisters on the top of the foreskin are usually not syphilis.
Patients with genital herpes may have erythema and blisters on the glans, prepuce, coronal groove, pubic mound and other external genital areas. So patients with blisters on the foreskin, mostly considered to be caused by genital herpes.
Patients with blisters on the foreskin is generally not syphilis, it is recommended that patients should seek medical attention in a timely manner, the doctor will choose the appropriate measures to treat the cause of the disease, so as not to delay the condition.