DO NOT USE FLEA COLLARS, FFS!!!!!
DEET does work. You need to make sure it has a high-percentage of DEET. Ultrathon by 3M is the brand that the US Military forces use. It repels all insects.
For sand flea bites, or any bug bite, swab the bite with....hang on........ammonia. Yep. Unscented plain old ammonia. Then, apply a topical steroid. Hydrocortisone works and you can buy it at any pharma in Negril. A better choice would be betamethasone, but that's prescription only. I don't know if you need a prescription for it in JA, though...
