hi, i have ulcer looking white dots on my lips, and it looks like that there is yellow pus coming out of it, but it isnt, the white dots on my lips will go away after a few hours, and become red with maroon looking dot on my lips, and after a few hours, it comes back again being yellow. the ulcers became from 1 to around 6. they are on my lips and tongue, and my gums are inflamed, and i believed it is gingivitis.