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.
Inside the mouth, persistent white lesions can be concerning. Oral lichen planus is a benign condition of the inside cheeks, lips, or tongue. This diagnosis should be made by a professional, because white lesions inside the mouth can also be squamous cell carcinoma. A common cause of white lesions in the mouth is oral candidiasis, which is a yeast infection.