Apple Watch strap problem

There are some people who will be allergic to elastomers in silicone bands. If you've owned the band and watch less than 14 days, you can return the watch and band for refund and buy a different combination. If you've owned them longer than 14 days, you can contact Apple Support, but there's not likely much they'll offer other than to suggest you purchase a different band made of materials which you may not be allergic to.

On Amazon, you can find thousands of Apple Watch Bands made out of different materials, from nylon, to leather, to stainless, etc. Many won't cost you much money.

Here is how to contact Apple Support --> Contact Apple for support and service - Apple Support

Thank you for participating in the Apple Support Community.

We want to make sure you reach the right team for help with your device. We recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support.

The best advice is to follow the links given by others above. This will pick up your location to give you the relevant options for where you live around the world. (some regions have different options, and the spelling of your name suggests you might not be in N America or Western Europe where may of us know the local support options).