There is a dark spot that is showing up on all my pictures and it's getting larger

Please clean the camera lens , a very small spot can look very large when viewed on screen.

If these spots are in different places on each picture, then they are actually reflections of dust particles in the air from the flash being so close to the lens. If they are in the same place on each picture, then they are indeed water spots on the lens.

This is normal behavior when shooting in low light. Just like when someone is speaking softly into the phone, you may turn up the volume on your end. Any background noise, you can now hear more.

Similarly, when there is low light, the camera turns up the amplification on each pixel. Some pixels naturally have a bit more background noise than others, and these show up as bright spots. A higher ISO setting where the camera is more responsive to light is where this occurs.

At a high ISO, taking a picture of pure black shows up as a mottled grey with a few bright spots for pixels that have a lot of noise.

You can overcome this if you have a tripod - set the camera to manual and a use a lower ISO setting. Rotat the selection wheel to M for manual and then press the ISO (just above the function set) button to scroll through different ISO settings.

Photoshop and other programs have noise reduction tools and a tools to remove "hot" spots as well.

Not a good sign I'm afraid to say. If the 'dark spot' is coming through into the pictures that means some pixels are not sensing light. They will look square shaped if you expand the picture on your PC.
If the lCD was faulty (or had some dead spots) this would show when focussing and taking pictures, but, would not show in the final picture.
I'm assuming you have cleaned the lens (just in case) there is a 'dirt' spot that a finger could have put there. (clean with damp soft tissue )
There is a Panasonic help site which I checked but most reported problems were USB connections and battery life etc .. Try it and ask anyway - can always ask -- Ray
http://www.retrevo.com/support/Panasonic-DMC-FH20-Digital-Cameras-manual/id/23641dj090/t/2/

If the spots appear in the same place in each picture, then you have dust on your sensor. Google the words "how to clean a DSLR sensor". You will find sites explaining the procedure with pictures and where you can get the supplies. You can do this yourself...it's easy.

Hi,

Your lens might have a spot on it. You can remove it by giving it to a camera repair shop.

Thanks

Hi,

on the surface of the CCD, that's a picture sensor chip, inside the zoomunit there will some contamination such as dust or an other particle
The ccd surface must be cleaned by an camera repair center

regards Rob NL

it should be a stain spot on the camera lens..try taking it to an authorised service point and have it cleaned

It sounds like the aperture is getting set very high. If the aperture is a high number, the lens opening is very small which lets less light in and would cause a dark image. This would also show any dust that is in or on the lens or image sensor. The dust doesn't usually show on apertures with a larger opening (smaller number). Make sure your aperture is being set to a reasonable number, probably no higher than 8 or so.

check the shutters, it prob not opened all the way