Although these natural oils and things can help, I do think that at the end of the day, a long-term scabies problem has to do with a weak immune system. I realize that scabies is very contagious and the mites reproduce fairly quickly. I'm not saying that one shouldn't try to treat it with medications or remedies. It's definitely important to do that. But it's also important to strengthen the immune system. So cutting down on stress, eating healthier, exercising more and avoiding alcohol and tobacco will also help.