A boil is a folliculitis and is a localized folliculitis with significant redness, swelling, pain and pus. To determine whether the pus root of the boil is eliminated, it is necessary to judge from the external symptoms. After the pus is eliminated, the localized boils of the patient can quickly become less red and swollen, and the pain will be significantly reduced, and the hardness of the boils is relatively hard to the touch, which will be significantly reduced after the boils are eliminated. The patient will experience a significant decrease in local skin temperature, pain relief, and good healing 1-2 days after the boil is drained. If the pus is not drained, the patient may experience a localized boil infection that continues to worsen. If you are still unsure about the above drainage, you can go to the hospital for a thorough examination.