Fasting is very common among Jains and as a part of festivals. Most days at special times, during festivals, and on holy days. Paryushan is the most prominent festival, lasting eight days in Svetambara Jain tradition and ten days in Digambar Jain tradition during the monsoon. The monsoon is a time of fasting. However, Jain may be at any time, especially if he or she feels guilty. Variations in fasts encourages Jains to do whatever they can to maintain whatever self control is possible for the individual. According to Jain texts, deep concentration is fasting (upavāsa).
Fasting can be done to both the body and mind fasts are also done as a penalty.
The word Proşadha refers to the holy days in the lunar month. It means giving up the four kinds of food. Proşadhopavāsa is fasting on the eighth and fourth day of the lunar cycle. According to Jain text, Puruşārthasiddhyupāya: The fasting householder discards bodily adornments such as bath, perfume, garlands, and ornaments, and spends his time in a sacred place thoughts by listening to or making others listen to the scriptures and refraining from injury.
There are several types of fasts:
Hallkhanā is the last prescribed by the Jain ethical code of conduct. The vow of roomkhana is observed by the Jain ascetics and the lay of their lives by the diet of food and liquids. This practice has been considered by experts.