To prevent tick bites, you need to prevent ticks from crawling over your clothes and skin. Coat your clothes with permethrin, a chemical that will kill ticks on contact. For your exposed skin, use repellent that contains DEET. When you come back in from the outdoors, it is essential you check yourself to make sure no ticks have snuck inside your house on your body or clothes. Ask a friend or family member to help check. Using a mirror if you are by yourself. Try to shower when you come back in to wash off any repellent and find any ticks hiding on your body.