Chilli is pungent and hot in nature. Chilli increases the secretion of digestive fluids, effective for deficiency of digestive function. Patients who suffer from peptic ulceration should avoid eating chilli. Chillis are damp and hot in their nature, so if you are suffering from yin deficiency symptoms such as stress and insomnia, you should avoid chilli as they can cause build of blockages in the system which can lead over a long period of time to tumours. Chilli can be quite good for yang deficiency symptoms such as poor metabolism. Cold natured people in cold weather can eat chilli to warm up the body and help circulation and metabolism.