There are about a thousand different ways you can try to repel mosquitoes, but in my experience, very few of them are 100% effective -- and the ones that are shouldn't live on or near your skin every day. You can't always control when you're going to get bit, but there are a couple of things you can do to stop those bites from driving you crazy. One I find particularly interesting is Heat It, an accessory that plugs into the charging port on your phone and uses an app to create a hot spot you press to the bite to dissolve the chemicals causing itchiness. The app also lets you document the number of bites and symptoms, to better help you determine if additional steps should be taken for your health.
Important note: The Android version of this accessory is USB-C, but it does not work with the new iPhone 15 series. An Apple-specific version will be available soon, but currently, only iPhone 14 and older are supported.