You can determine whether you have a hot or cold constitution by your body type, fear of heat or cold, and the type of symptoms that tend to appear after the onset of illness.
The hot constitution, i.e. yang quality, is a type of constitution with the characteristics of excitability, heat and hyperactivity, which is characterized by a thin or moderate body; a slightly reddish or slightly blackish color, or oily skin; fear of heat and love of cold, or easy sweating and love of drinking water, etc. After the onset of an illness, the symptoms are usually hot or solid. After the onset of evil, it is often manifested as heat, solid evidence, and so on.
Cold physique, i.e. yin quality, refers to the type of physique that is inclined to inhibition, cold, and static. Its physical characteristics are fat or moderate body, easy to fatigue; face white and less Chinese; small amount of food; usually fear cold and like heat. After the onset of the disease by the evil mostly manifested as cold evidence, false evidence, etc..
If you need to determine what kind of constitution you have, it is recommended to consult a professional doctor.