" Mao was duly fired from this position. Criticized as “opportunistic” and “right-wing,” he found himself kicked out of the Central Committee, and was not even invited to attend the next CCP congress scheduled for January 1925.* His health now took a downturn, and he grew thin and ill. A then house-mate and colleague told us that Mao had “problems in his head … he was preoccupied with his affairs.” His nervous condition was reflected in his bowels, which sometimes moved only once a week. He was to be plagued by constipation—and obsessed by defecation—all his life. Mao was "

― Jung Chang , Mao: The Unknown Story