Summer-Heat is one of the six exterior pathogens (i.e. a quality in the environment or climate which can cause disease). It is the predominant climatic factor in summer and arises from the transformation of heat and fire. It is also a pure exogenous (external) pathogen, and there is no equivalent endogenous (internal) pathogen. As its name suggests, it is a condition usually arising from excessive heat in summertime, i.e. a heatwave. An attack by Summer-Heat can also be due to low adaptability of the body to the environment. It often combines with Dampness to manifest as certain types of illness.
- Pure Yang pathogenic factor characterised by burning heat
- Tendency to injure Yin
- Associated with the Heart
Symptoms and Signs:
The invasion of the body by Summer-Heat often manfiests with the following clinical symptoms.
- High fever
- Profuse sweating
- Aversion to heat
- Thirst with a strong desire to drink
- Dry lips
- Dizziness and blurred vision
- Flushed face
- Scanty yellow urine and constipation
- Collapse of Yin
- Dry, red tongue and a surging pulse.
- In severe cases it may result in delerium, slurred speech or unconsciousness.
- Nausea and vomiting
- Loose stool or diarrhoea
- Poor appetite
- Phlegm may rise, affecting the head, causing dizziness
- Disturbed ‘foggy’ feeling in the head
- Tightness of the chest
- Some sweating