Why is Tongxin cuisine also called "cramp dish"?

Concentric dishes are cold, and people who are usually in poor health or afraid of cold are prone to cramps, so they are called "cramping dishes"

Rattan cauliflower, also known as water spinach, grass cabbage and bamboo cabbage, is traditionally called water spinach or cramped cabbage, and is called water spinach in some areas.

Tongxin lai, also known as spinach, is sweet and non-toxic, and has the functions of clearing away heat and toxic materials, cooling blood and diuresis. Folk also known as cramp dishes. Not everyone will cramp after eating it. Just because the individual's physique is different. People with deficiency-cold constitution will cramp their calves only if they eat too much.