Apply warm compresses and soak the boil in warm water. This will decrease the pain and help draw the pus to the surface. Once the boil comes to a head, it will burst with repeated soakings. This usually occurs within 10 days of its appearance. You can make a warm compress by soaking a wash cloth in warm water and squeezing out the excess moisture.
When the boil starts draining, wash it with an antibacterial soap until all the pus is gone and clean with rubbing alcohol. Apply a medicated ointment (topical antibiotic) and a bandage. Continue to wash the infected area two to three times a day and to use warm compresses until the wound heals.