Fever without cold means that the patient only has fever and does not feel cold or, on the contrary, dislikes heat. Such a problem usually pertains to internal heat syndrome caused by exuberance of yang or asthenia of yin. According to the degree, time and features, fever can be further divided into high fever, tidal fever and mild fever.

High fever:
High fever means that the patient suffers from serious high fever hard to be relieved with the symptoms of aversion to heat instead of to cold. It is usually caused by wind-cold invading into the interior and transforming into heat, or by transmission of wind-heat into the interior, struggle between pathogenic factors and healthy qi and internal exuberance of yang-heat, the steaming of which manifests externally. High fever is usually seen at the qi phase stage of exogenous febrile disease, pertaining to internal sthenia-heat syndrome, usually accompanied by flushed cheeks, profuse sweating, dysphoria, thirst and preference for cold drinks.

Tidal fever:
Tidal fever is marked by regular occurrence or regular worsening. According to its cause and pathogenesis, it can be further divided into the following categories.
 
Yangrning afternoon fever:
It is marked by continuous fever and severity in the afternoon (3 - 5 o’clock in the afternoon)?when qi?in yangming?meridian?is superabundant, accompanied by constipation and unpressable abdominal hardness and pain due to invasion of pathogenic heat into yangming, retention of dry-heat in stomach and intestines as well as obstruction of intestinal qi.
 
Damp-warm tidal fever:
Damp-warm tidal fever is marked by fever, worsening in the afternoon or evening and dull fever (that means that it does not feel feverish when the hand touches on the skin at first, but after a?while the hand feels scorching hot), usually accompanied by epigastric and abdominal fullness and oppression, nausea and vomiting, heavy sensation of the head and body, loose stool and diarrhea as well as thick and greasy tongue fur, often caused by retention of damp-heat in the middle energizer, stagnation of dampness and latency of heat and failure of heat to get out of the body as well as stagnation of dampness and steaming of heat.
      
Yin-asthenia tidal fever:
It is marked by fever in the afternoon or evening and feverish sensation over the five centers (palms, soles and chest) or steaming fever in the bones); usually accompanied by flushed cheeks, night sweating, dry mouth and throat as well as reddish tongue with scanty fluid, often caused by consumption of yin fluid, failure of yin to control yang and endogenous asthenia heat.

Mild fever:
Mild fever, also known as low fever, means that the fever is slight or indistinct or subjective sensation of fever with normal temperature. Mild fever is marked by longer duration. The cause and disease involved are complicated. For example, internal heat due to yin asthenia leads to prolonged low fever; prolonged mild fever, also known as fever due to qi asthenia, is usually caused by asthenia of spleen qi, sinking of gastrosplenic qi and failure of lucid yang to rise which stagnate into heat; mild fever may be caused by emotional upsets and failure of the liver to disperse and convey, leading to fever due to qi stagnation.