you probably have a urinary tract infection (UTI). It should eventually go away, but just make sure you wash your penis really well and don't get any soap inside of it, because that will make it burn more.
In the sun. You could burn it.
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Maybe yours is in someway cut or scratched that the chlorine burns it
Ask the doctor.
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As long as the person with HIV doesn't have any open wounds, and as long as the penis did not come in contact with any mucous membranes or bodily fluids, then you're safe.
most likely an allergic reaction
By using a condom and a lubricant. It is a friction burn from over rubbing while too dry.
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To treat brush burn on the penis, first gently cleanse the area with mild soap and water to prevent infection. Apply a soothing ointment, such as aloe vera or a petroleum jelly, to keep the skin moisturized and promote healing. Avoid any irritants, such as tight clothing or friction, until the area has healed. If pain or irritation persists, consult a healthcare professional for further advice.
an STD, rash, if u havent been circumsized it could just be irritation and need cleaning under the foreskin but still check with a doctor
A penis skin bridge is an attachment of the shaft of the penis and the head of the penis.