Many different types of bacteria can cause PID. Most often, PID is caused by infection from two common STIs: gonorrhea and chlamydia. The number of women with PID has dropped in recent years. This may be because more women are getting tested regularly for chlamydia and gonorrhea. You can also get PID without having an STI.
It's fairly common for people to use tea tree oil for warts, although care should be taken to avoid skin irritation. While some people prefer to apply the oil directly to the warts, health care practitioners usually suggest diluting it first with water or a carrier oil, such as olive or almond oil.
One study found that tea tree oil worked as well as 5% benzoyl peroxide in controlling the symptoms of acne. It appears to be effective with toenail fungus and possibly athlete's foot. Studies of tea tree oil for other conditions such as gum disease, vaginal infections, and dandruff have been inconclusive. Tea tree oil has been proposed as a topical treatment for herpes labalis (the common cold sore), but it does not appear to be effective.