What happened to the swollen head of the baby’s penis like a blister? Usually normal children’s early chicks are foreskin is in a state of adhesion, this situation if there is an infection in the head of the chick, there may be foreskin head edema, edema serious when you can see similar to the shape of a blister. If it is said that the foreskin mouth is too tight, urine will first gather in the foreskin when urinating, and only after the foreskin swells up and the pressure is high enough will urine be discharged from this narrow foreskin mouth, at this time the swollen chicks seen, the blister-like change is mainly because of the narrow foreskin tube caused by the tight foreskin mouth, you need to go to the hospital to find a doctor to do a simple foreskin separation, it can be solved. If it is caused by infection, he must do the appropriate infection treatment, anti-inflammatory treatment, you can generally give him a boric acid water rinse, soak, to the local application of some anti-inflammatory ointment or erythromycin eye ointment, lifting the infection after the swelling can subside. Therefore, different measures should be taken according to different causes, and in general, problems are found to seek medical attention in time to avoid serious consequences.