Neem Oil, or Azadirachta indica, is a vegetable oil pressed from the fruits and seeds of Neem tree.
The tree is native to India and has long been used in traditional medicine and as a natural and effective pesticide for organic farmers.
The oil has natural anti-inflammatory properties that help relieve swelling skin.
It is also anti-bacterial and is a natural pain killer for relieving painful skin flare-ups.
You can read more background detail about this much under-rated and under-used natural wonder here.