Feeling of air bubble constantly trapped in vagina and very dry vagina? What could that be?

Vaginal air/fluids. Air gets trapped in the vagina naturally from exercise or certain movements. It is more common in women who have had multiple vaginal deliveries. Often the air will be expelled at inopportune social times, audibly. Vaginal lubricity is a function of a healthy non infected vagina and adequate fluid ingestion. Sexual arousal will enhance fluid production.