Is the presence of red patches on the tongue without coating related to a constitutionally cold body type?
Generally, when red patches on the tongue appear without tongue coating, accompanied by cold symptoms such as chills and diarrhea, it may be related to a constitutionally cold body type. However, if symptoms such as dry mouth and constipation (indicative of internal heat) are present, it may not necessarily be associated with a cold constitution. Detailed analysis is as follows:

If red patches appear on the tongue without tongue coating, and are accompanied by frequent feelings of coldness, cold limbs, easy diarrhea after consuming raw or cold food, and pale oral mucosa, these cold body signs may affect the condition of the tongue, which could be related to a constitutionally cold body type.
If red patches on the tongue appear without tongue coating, accompanied by symptoms of internal heat such as dry mouth, dry stools, and easy onset of sores, or if caused by oral bacterial infection or vitamin deficiency, and without significant chills, this situation may not be related to a constitutionally cold body type.
When abnormalities appear on the tongue, it is important to adjust your diet, avoid excessive consumption of raw, cold, or spicy foods, and observe other accompanying symptoms. If symptoms persist, seek timely medical evaluation based on overall health status for proper management or treatment.