Sensitive Penis Head

im 15 and new to puberty and i masturbate but when my penis head it touched by anything thats not my foreskin it is sensitive even when in the shower, does anyone know any natural way to cure this? thanks

The sensitivity you have is very normal - over time for most males this will reduce.
What some men do who have had this type of effect ongoing for years is to keep the head of the penis exposed for as long as possible. So what you would do is fully expose the head and by means of trial and error, find a way for the foreskin not to roll-back over the head.
And yes, when you put your penis away in your underwear / sports shorts if you wear them, instead, is that it may even feel painful to have all of the skin on the head of your penis that exposed.
Over time you will no longer notice the level of feeling that you currently have - so other than that, it is a natural part of the process of sexual maturation …