Look at the surface of the leaves. If your plant is indeed infested with spider mites, the leaves may have yellow blotches on them. When light falls on the leaves, you may see a silvered look or even streaks of bronze or silver.
Healthgrades Editorial Staff. White patches in the mouth are a common symptom of infection, inflammation, trauma, malignancy, and other underlying conditions and diseases. Mouth white patches result from pathogens, such as bacteria, viruses and fungi, which inflame the lining of the mouth causing swelling, redness, and ulcer formation.
Common signs of yeast infection in the mouth are: 1  Oral thrush symptoms usually appear as white tongue, yellow or white coating on the tongue. 2  White spots inside the mouth and on the tongue. 3  Dry mouth.  Dry lips, chapped lips (especially the lower lip).