It could be related to chakra exhaustion. If Sakura overuses her chakra in a very difficult situation, like trying to heal a large number of injured people or in a long - drawn - out battle, it might lead to her death. Her body may not be able to handle the strain, and she slowly starts to fade away as her chakra depletes completely.
One possible reason could be a powerful enemy attack. Maybe she was caught in a fight against a much stronger foe who used a deadly jutsu on her. Another reason might be a self - sacrifice. Sakura could be in a situation where she has to give up her life to save her teammates from Team 7.
The best chapter pointer here is Chapter 71, "The Theme of the First Day—Breaking New Ground!". It opens with Shu Yan curled her lips with a hint of jealousy, "When can it be my turn... and closes on Now they had to work on an empty stomach..
A practical answer is Chapter 68, because it turns the idea into a concrete scene. The chapter opens with Jiang Li carried the noodles straight out of the kitchen and came to the..., adds pressure through Could it be those two didn't find a place to stay last night and slept..., and ends on But.
Chapter 73 is the strongest chapter-level answer because it starts from Director Sun, tongue-tied, finally managed to squeeze out a sentence,... and follows through on Despite Wen Jiaojiao's fiery temper, there were still many who were drawn....
A practical answer is Chapter 86, because it turns the idea into a concrete scene. The chapter opens with After over an hour of fuss, it was finally time to eat., adds pressure through Having tasted the tomato and eggs again, Wen Jiaojiao sighed in relief,..., and ends on But then her expression.
The best chapter pointer here is Chapter 91, "Jiang Yan is Number One on the Trending Searches Again?!". It opens with When Jiang Li saw that he had been assigned a harrow, Qi Tianyu felt his... and closes on Hahaha, Young Master, what the heck are you thinking about eating!" "I'm....
A practical answer is Chapter 103, because it turns the idea into a concrete scene. The chapter opens with Jiang Yan looked at Zhao Lang with suspicion, eyeing the dark substance in..., adds pressure through At least he's not denying his debts.], and ends on Jiang Yan felt deep guilt welling up.
If you want the clearest chapter reference, go to Chapter 68. Early on, Jiang Li carried the noodles straight out of the kitchen and came to the...; later, the chapter leans on Uncle had already returned from the fields, and he was sorting through a....
Chapter 68 is the strongest chapter-level answer because it starts from Jiang Li carried the noodles straight out of the kitchen and came to the... and follows through on But didn't Uncle Zhao say he was still sick?.
If you want the clearest chapter reference, go to Chapter 101. Early on, Jiang Li walked over to the slope where the two had fallen down.; later, the chapter leans on Below the small hill was nothing other than a large patch of sludge..
The best chapter pointer here is Chapter 68, "She finally managed to win a round back!". It opens with Jiang Li carried the noodles straight out of the kitchen and came to the... and closes on But didn't Uncle Zhao say he was still sick?.