Itachi Have A Disease. There is a lack of knowledge about the disease. Itachi overcame the disease with another medication to complete his plot on Sasuke, but details are never disclosed.
Illness is briefly described in chapter # 401 of the original Naruto manga. Sasuke’s brother was “suffering from an illness, well aware of his imminent death,” and “extended his life on drugs,” according to the definition.
Itachi’s illness was not disclosed until the end of the account. During his war with Sasuke, it was revealed that his excessive use of Mangekyo Sharingan caused his problems. However, his condition of causing a near-death catastrophe showed that he was not connected to the Jutsu.
Why did Itachi die so easily?
Itachi’s long-term strategy included allowing Sasuke to win the war to build his Mangekyo Sharingan. Itachi established Sasuke as the hero who saved Leaf Village by joining Akatsuki. Because Itachi allowed Sasuke to defeat her, she died immediately. The dignity of the Uchiha family was restored.
Itachi fought, killed, or fled countless well-known ninja. Although Sasuke was the strongest during their fight, Itachi probably still held on. He would have beaten Sasuke despite having a minor shareholder if Itachi wanted to.
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What if Itachi was never sick?
Things would probably have been the same if Itachi had never been sick. Illness caused the two to meet again quickly. Itachi knew very well that Sasuke’s hunt would not end. To conspire against Sasuke, he used “medicine” to prolong his life. Itachi decided that the most significant way to give new skills to Sasuke while renovating the name Uchiha was self-sacrifice.
Itachi was suffering from an illness. The details were not disclosed, but she had to take medication to survive.