Epsom salts are great when dealing with scabies but they are not a cure all for scabies as you will need to cover your entire body using treatments specially for scabies as they can burrow deep within the dermal layer of skin.
However, when used in a bath regularly they can potentially kill any mites near the surface of the skin as they salts contain sulfates which could cut off the mites oxygen or circulation. This is one of the reasons why the salts are great but another reason is the fact they will help your skin heal and help surface the dead mites and debris from within under the skin.
Since the debris under the skin is what triggers the allergies you can use the salts in the form of a bath to put an end to post scabies faster. Post scabies just refers to the state your skin is left in after scabies treatments as the skin will be left very dry, damaged and with debris under it.
Epsom Salts Online
You can get epsom salts here and use a full cup in a warm bath each night for 30 minutes. The salts will also help to relieve the itching and allow you to get a full nights sleep. Just be careful though if you are older or have respiratory issues as the salts can cut off air circulation and make breathing hard while in the bath.