Welcome to the forum. This is a very common phenomenon in cave photography when using a point-and-shoot with a flash. It's caused by dust particles or water droplets or steam/vapor etc suspended in the air reflecting the light from the on-camera flash back into the lens. Particles can be anywhere in the field of view, not just close to the flash or lens. Dust specs on the lens can also cause problems.
A common fix is to use an external flashgun held away from the camera (arm's length is fine), and triggered with your on-camera flash muted by a piece of tape or similar. Another option is to turn your camera flash off, hold the camera steady (preferably on a tripod or improvised stand), and do a longer exposure using bright LED lights or a manually fired flashgun.
For more discussions about orbs and other mysterious flash photo distractions, see
looking for my first tough digital camera and
fog monsters you have captured.