Erythema multiforme is an immune-mediated skin condition that may develop inside the mouth. Oral symptoms can ... Tests can include: blood tests liver function tests chest X-ray skin biopsy ...

Petechiae are red or purple dots on the skin that happen when tiny blood vessels called capillaries ... It can also appear on ...

The dead white blood cells and germs collect together ... other symptoms of strep throat include: Tiny red spots on the roof of your mouth Pain while swallowing Sore throat Swollen lymph nodes ...

But if it happens in your mouth, it's oral lichen planus. White patches on your tongue, cheeks, and gums, which can appear as tiny dots or lines forming a lace-like pattern Redness and swelling ...