Boils are pus-filled boils, and it is not recommended to pick at them on your own when they become pus-filled. Smaller boils can usually burst and drain on their own, while more serious boils need to be drained in the hospital. If a boil is pushed out by itself, secondary infections may occur and aggravate the condition as the sterility and safety of the tools used cannot be guaranteed. Smaller boils will usually burst on their own and drain the pus, and then gradually heal on their own. During this period, the ulcerated area should be sterilized to avoid infection. If the boil becomes pus-filled and hard, the boil should be drained in the hospital. If you have a pus-filled boil, you should listen to your doctor’s advice on how to treat it and not to treat it on your own. Meanwhile, you should pay attention to the cleanliness of the local area and eat a light diet during the treatment.