Boils usually need to open and drain in order to heal. This most often happens within 2 weeks. You should: Put warm, moist, compresses on the boil several times a day to speed draining and healing.

Can a boil heal without draining?

The pus in your boil will begin to drain on its own, and your boil will heal within a few weeks. Your boil may heal without the pus draining out, and your body will slowly absorb and break down the pus. Your boil doesn't heal and either stays the same size or grows larger and more painful.

How do you know when to drain a boil?

It can take anywhere from 2–21 days for a boil to burst and drain on its own. However, if a boil becomes bigger, does not go away, or is accompanied by fever, increasing pain, or other symptoms, a person should see their doctor. Following treatment, a boil should drain and heal fully.