The frequency of threading your upper lip hair will depend on how quickly it grows back and your personal preference. Typically, hair growth on the upper lip area grows fast as compared to the other facial hair, so you may need to thread upper lip hair more frequently than other areas.

Most people tend to thread every 2-4 weeks. However, this may vary according to the individual hair growth pattern or personal preference. If you notice more visible growth on your upper lips, it may be appropriate to schedule a threading session.

Ultimately, the decision of threading is totally up to you, just listen to your body and adjust the routine as needed.