Hello I appreciate your concern Foreskin secrets and acculmutes it s secretion known as Smegma under inner surface of foreskin I would like further information to help you better your age and relevant medical history Frequency of masturbation Circumcision is the surgery advisable to cut the foreskin and prevent accumulation of Smegma which can cause a penile cancer if not removed properly and regularly In my opinion you should wash it properly after sex or masturbation Consult your doctor if it s very copious and thick to rule out STI Have plenty of fluids Maintain good hygiene Thanks and regards