This page explains why neem scabies treatment works and why it is often preferable to other "medications".
To understand how a neem treatment works against scabies, it is important to understand what exactly scabies is and what causes it:
Scabies is a highly contagious and extremely irritating skin condition caused by a mite infestation.
The parasitic scabies mites (Sarcoptes scabiei) tunnel underneath the skin to lay their eggs. The eggs, faeces and dead bodies that the mites leave behind cause a severe irritation and allergic skin reaction. (Just thinking about it is horrible enough...)
Because the mites live under the skin they are hard to get to and kill. So the substance used to kill the scabies mites has to penetrate your skin. In other words, it enters your body.
Any prescription treatment for scabies is very harsh on your skin and body, period. It can do more harm than good.
On the other hand it is well known that neem is good for you, for your skin and for your immune system.
Permethrin, a pesticide and the most common scabies treatment, is a known skin irritant. It's true that permethrin is poorly absorbed through healthy skin, but people with scabies symptoms have broken skin and lesions, so the protective barrier of the skin is compromised.
Because of the allergy to the scabies mite (the allergy is the main reason for the symptoms of scabies) the skin is already oversensitive, the immune system is in overdrive, and an immune response like dermatitis is more likely.
A skin reaction to permethrin may be uncommon in people with healthy skin, but it's not uncommon among scabies sufferers.
Also, the scabies mite is resistent to many pesticides, but not to neem treatment. So natural treatment of scabies with neem is particularly useful for persistent cases, where other scabies treatments have failed.
On top of that neem is actually used as and recommended for skin care, especially for irritated and inflamed skin.
The instant relief from symptoms that a lot of people report is due to the anti-inflammatory, antibacterial and analgesic action of neem. (You can read more about that on the pages about neem and psoriasis or neem and eczema.) Neem is good for your skin!
With that said, let's look at some research results and studies on the use of neem for scabies: Scabies Neem Research Results