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.
There are also some studies on Medline, even though anecdotal, that tea Tree Oil has been as effective as salicyclic acid. To use Tea Tree oil on plantar warts or verrucae, apply the oil with a cotton tip swab several or three times a day. I've read some stories of this working in 4 weeks or less. It also should be noted that Tea Tree Oil may provide a little pain relief at the same time, although this is not proven.