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.
What to look for. 1  Inside of mouth and gums look red, shiny, or swollen. 2  Small ulcers or sores in mouth, on gums, or on or under tongue. 3  A white or yellow film in the mouth or on the tongue. 4  Blood in the mouth. 5  Soft, whitish patches or pus in the mouth. 6  Increased mucus in the mouth. 7  Soreness or pain in the mouth or throat.