Caused by Pathogenic Heat or by excessive vital function. Marked by feverishness, flushed face, thirst, craving for cold drinks, constipation, red tongue with yellow coating, rapid pulse. Marked by restlessness or mania, feeling of heat, skin diseases with red eruptions, mouth ulcers, itching, excessive menstrual bleeding, hemorrhage, dry mouth, red tongue, rapid pulse. Refers to toxic Heat generated by bacterial or viral infection. Refers to the depth of the disease.
Interior syndromes are mostly severe or chronic and deep.
In interior diseases the pathogenic factors are on the interior of the body and attack the organs. Tongue is scarlet red on tip and sides, with yellow coating. Pulse is wiry and rapid. Marked by mental irritability, bitter taste in mouth, thirst, etc. Similar to Fire but not as severe.