Can i use sunblock over expigment cream and then makeup over them ??????

Yes: You can use sunblock with it. Make-up too, but but if your skin is cracking from the expigment, it could make it worse. So just use a hypoallergenic sunblock while you start it, until you are used to the cracking, itching, stinging that can occur at first.

Be careful: While you likely can, all these topical treatments used at once are likely to irritate your skin. Try to space out the use of these creams. Remember the creams meant to help with pigmenation are often only used at night but that you will need a good sunblock to use during the day to make sure any benefits aren't lost.