If the skin of the penis is dry, you can apply petroleum jelly to moisturize it. However, it is important to note that petroleum jelly should not be used with condoms, as it can react with the rubber and cause condoms to break. Vaseline is mainly used as an anti-inflammatory and to moisturize and protect the skin with a moisturizing effect. Commonly used in a variety of skin protection, such as environmental dryness, air dryness, hands, face, lips, the skin is more rough, peeling or cracked, can be applied externally Vaseline oil moisturizing skin, so that the skin is more moisturizing, retaining the skin moisture and nourishing the skin, and play a role in protecting the skin. Contraindications for the use of petroleum jelly: It should not be used for a long period of time. If used for a long period of time, the oily substance in petroleum jelly will easily clog the pores, which will cause inflammation of the pores and induce acne, and burn patients should not use petroleum jelly to protect the wounds because petroleum jelly applied to the wounds will affect the dissipation of heat. It is recommended that underwear should be changed and washed frequently to keep the penis dry and tidy, and the wrinkled skin needs to pay attention to maintaining hygiene, so as to prevent the emergence of some germs and infections.