Are red spots on the tongue and the absence of tongue coating possibly hereditary?
Generally speaking, whether red patches on the tongue and absence of tongue coating can be hereditary depends on the specific causes and family history. If discomfort occurs, it is recommended to seek medical attention promptly. Detailed analysis is as follows:

If red patches on the tongue and absence of tongue coating are caused by autoimmune diseases such as systemic lupus erythematosus (SLE), and there is a family history of similar diseases, the possibility of inheritance is relatively high. These diseases themselves have a certain genetic predisposition, and related disease-causing genes may be passed on to the next generation, increasing the likelihood of similar symptoms in offspring. Especially when triggered by specific environmental factors, symptoms may manifest.
If red patches on the tongue and absence of tongue coating are caused by acquired factors, such as spleen and stomach weakness due to long-term irregular eating habits, spleen and stomach weakness, local infections, or mechanical injuries, and there is no family history of inherited diseases, they typically are not hereditary. These situations are temporary or acquired changes caused by external factors or individual lifestyle habits, without gene-level abnormal transmission, so offspring generally do not need to worry about developing the same symptoms due to heredity.
When symptoms such as red patches and absence of tongue coating appear on the tongue, if there is a family history of related diseases, one should promptly understand the specific conditions of affected family members to provide reference for diagnosis. In daily life, maintaining good oral hygiene and avoiding irritation to the oral mucosa is important.