No, you should never use iodine on a boil. Iodine is an antiseptic that can be used to clean the skin, but it should never be applied to an open wound or boil. Iodine can cause further irritation and damage to the skin, and it can also delay healing.

Here are some things you can do to treat a boil at home:

* Wash the area with soap and water several times a day.

* Apply a warm compress to the boil for 20 minutes several times a day.

* Do not pick or squeeze the boil.

* If the boil is large or painful, you may take over-the-counter pain relievers such as ibuprofen or acetaminophen.

If the boil does not improve within a few days or if it becomes larger, more painful, or red, you should see a doctor.