Changes

There are four types of ''Nidana'':

There are four types of ''Nidana'':

#'''Sannikrishta''' (immediate causative factor): Immediate factors that cause afflication of a disease in a short span of time and do not require to wait for the different stages of ''doshaprakopa'' like ''chaya'' etc., are known as ''sannikrishta''. Such factors do not require any help of other causative factors to produce the disease, though it is not an independent agent either.

#'''''Sannikrishta''''' (immediate causative factor): Immediate factors that cause afflication of a disease in a short span of time and do not require to wait for the different stages of ''doshaprakopa'' like ''chaya'' etc., are known as ''sannikrishta''. Such factors do not require any help of other causative factors to produce the disease, though it is not an independent agent either.

#'''Viprakrishta''' (delayed/ chronic causative factor): These factors do not cause the disease in a short span of time. These causative factors have to wait for increased, gradual accumulation of ''doshas'' to get strength. A threshold, once reached, triggers the onset of the disease. The example of this is the accumulation of ''kapha dosha'' during ''Hemanta ritu'' (early winter season), causing diseases seen in ''Vasanta ritu''(spring season). ''Sannikrishta'' factors tend to use this foundation prepared by ''viprakrishta'' factors. As the diseases are immediately seen after the consumption of ''Sannikrishta'' factors, it gives the impression that the disease is caused only due to ''Sannikrishta'' factors. Thus, a disease cannot manifest independently by either ''Viprakrishta'' or ''Sannikrishta'' factors – it would require both.

#'''''Viprakrishta''''' (delayed/ chronic causative factor): These factors do not cause the disease in a short span of time. These causative factors have to wait for increased, gradual accumulation of ''doshas'' to get strength. A threshold, once reached, triggers the onset of the disease. The example of this is the accumulation of ''kapha dosha'' during ''Hemanta ritu'' (early winter season), causing diseases seen in ''Vasanta ritu''(spring season). ''Sannikrishta'' factors tend to use this foundation prepared by ''viprakrishta'' factors. As the diseases are immediately seen after the consumption of ''Sannikrishta'' factors, it gives the impression that the disease is caused only due to ''Sannikrishta'' factors. Thus, a disease cannot manifest independently by either ''Viprakrishta'' or ''Sannikrishta'' factors – it would require both.

#'''Vyabhichari''' (weak causative factors or doubtful causative factors): These types of causative factors are weak and they may or may not be the etiological factors responsible for the disease. These could be secondary factors that require some other factor to afflict the patient, or could become a primary factor if the time is favorable.

#'''''Vyabhichari''''' (weak causative factors or doubtful causative factors): These types of causative factors are weak and they may or may not be the etiological factors responsible for the disease. These could be secondary factors that require some other factor to afflict the patient, or could become a primary factor if the time is favorable.

#'''Pradhanika''' (primary causative factor): These types of causes are the definite causes of disease due to their own strength. For example, poisons, severe trauma, etc. are considered as ''pradhanika hetu''.

#'''''Pradhanika''''' (primary causative factor): These types of causes are the definite causes of disease due to their own strength. For example, poisons, severe trauma, etc. are considered as ''pradhanika hetu''.

==== B.Second classification ====

==== B.Second classification ====