Neem. As they are antibacterial, neem leaves are a great option to treat boils. First, boil a handful of these Indian lilac leaves until about two-thirds of the added water disappears, then allow the solution to cool. Once cooled to room temperature, the solution can be strained and applied directly to the boil. Alternately, one can directly add a tablespoon of water and a teaspoon of turmeric powder to a handful of fresh neem leaves, then grind the mixture into a smooth paste and apply directly on the boil.