Digestive heat (or lack of it) is REAL CAUSE of disturbance. 

Too powerful, dries up/burns  seven constituents, too weak, seven body constituents cannot go through the transformation process, person becomes weak, bad digestion - nutriment process hampered - digestive heat cannot be raised - ALL 3 HUMOURS INVOLVED IN THIS PROCESS. 

Excess intake of HOT and OILY  food -
chilli, meat, butter, alcohol.  Excess of  spicy foods, peanut butter, sour fruits, bananas, papaya, tomatoes and garlic, jaggery. 
 

Rainy season (Autumn) - oily and warm qualities, result in: anger, hatred. 
Sleeping during hot sunny days of Summer, imbalance of Tipa will affect.  BUT LUNG TYPES OK WITH THIS.  Too much physical exercise, in the sun, at mid-day 

Excessive indulgence in food and lifestyle which are SHARP AND HOT 
Excessive physical exercise in hot sun (or too much competitive exercise generally) 
Excess of pungent, hot food, exposure to anger, sleeping in mid-day heat, not sleeping at night, excess of physical activity at mid-day, carrying heavy things beyond capacity, digging hard soil, wrestling, physical fighting, too much walking,