Scabies that are resistant are very hard to treat and could come back and re-infest the person. These mites usually last for a longer period and would take a lot of time to heal. Therefore, it becomes exceedingly important to get scabies treatment as soon as you start noticing the symptoms of scabies. You've got to be able to correctly diagnose the problem and you can treat mites which only if you can find a solution which works.
On the other hand, it is very important to strictly follow the treatment process. In case of resistant scabies, the parasites would continue to evolve at a faster pace and therefore they would gain resistance against tropical creams and medications.
Also if you don't apply medication properly it will become ineffective as the mites will become resistant. Most patients often apply the medication on the affected areas, however as far as scabies are concerned, natural or synthetic tropical creams have to be applied on the entire body from the neck to the toe. If this is not followed properly, the scabies mites would still remain alive beneath the surface of the skin and cause re-infestation.
Also be sure that your choice of cream is the correct strength. Attempt to generously apply it when you can. In addition apply the medication after a hot bath right before bedtime. Everyone in the household should be treated the same way how to kill scabies and the bed sheets as well as the covers must be laundered every day.