To protect yourself against sand fleas, it is recommended to limit direct exposure to sand by using a towel or lounge chair instead of lying directly on the ground. Wearing sandals can also help prevent bites. Additionally, bringing creams like calamine and hydrocortisone to apply to the bites can help relieve itching. It is not advisable to use Benadryl cream, as some people may have allergic reactions to it. It's always a good idea to ask a pharmacist for advice on where to find the proper medications.