Applying ichthyol ointment to boils without pus is usually a good idea to keep applying it until the boil has suppurated and broken open, then there is no need to apply ichthyol, and if the abscess forms without breaking open, it will need to be incised and drained. Ointment of ichthyol is more suitable for use when the boil is not suppurating, the main action of ichthyol is to concentrate the pus, which will reduce and soften the extent of the red, hardened nodule, and make the purulent discharge less than if it had broken open of its own accord. If a wound has broken open, try to avoid using ichthyol ointment to avoid infection and other discomfort. Boils are usually caused by broken skin and other factors that lead to bacterial infection of the skin follicles, which in turn leads to the development of boils. If the boils appear to be pus-filled and do not rupture, they can be incised and drained under the guidance of a doctor, and the skin should be kept clean and broken skin avoided. If boils are present, it is important to keep the boils clean to avoid infection, and avoid spicy and stimulating foods in your diet.