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.
What happens if pus is not drained?
If a skin abscess is not drained, it may continue to grow and fill with pus until it bursts, which can be painful and can cause the infection to spread or come back.
Will an abscess go away if not drained?
A small skin abscess may drain naturally, or simply shrink, dry up and disappear without any treatment. However, larger abscesses may need to be treated with antibiotics to clear the infection, and the pus may need to be drained.
Do all boils need to be drained?
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.
Is it good to squeeze pus out of a boil?
A person should never try to squeeze or burst a boil, as this can cause the infection to spread to other areas of the body. It may also result in scarring. If a boil is particularly big, persistent, or accompanied by other symptoms, a person should see their doctor.

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