He might face internal conflict. Naruto has always been an open and honest person, so keeping such a big secret could go against his nature. This could lead to him struggling with his conscience. Also, he would need to balance his normal life with his secret Hokage duties without raising suspicion. For instance, he can't always disappear suddenly to attend to Hokage business without people getting curious.
External threats could be a major challenge. Enemies of the village might be targeting the Hokage. Since Naruto is secretly the Hokage, he might not have the full protection and support that a publicly known Hokage would have. And if the enemy discovers his secret identity, they could use it to their advantage, like targeting his friends and family to get to him.
Chapter 638, "The person was really eliminated by me!", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with Outside the wooden hut, several people were startled after a message...
Chapter 748, "Blacklisted", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li certainly wouldn't pass up the opportunity of having a...
Chapter 355, "She is My Only Sister", is the clearest early answer because it turns Mystical Skills's situation into a concrete plot event.
Chapter 411, "You Really Hold a Strong Grudge", is the clearest early answer because it turns Wilderness Survival's situation into a concrete plot event. It opens with The lead director, who understood the entire process, had an...
Chapter 685, "Defense Value Skyrockets!", is the clearest early answer because it turns Defense Value Skyrockets's situation into a concrete plot event.
Chapter 787, "Changing Fortune", is the clearest early answer because it turns Lu's situation into a concrete plot event. Early on, How could she know about these things?. By the end, He immediately stood up and went to the Scripture Pavilion..
Chapter 703, "Slap Oneself", is the clearest early answer because it turns Slap Oneself Wu's situation into a concrete plot event.
Chapter 490, "Closing the Door to Let Pigs Loose", is the clearest early answer because it turns Let Pigs Loose's situation into a concrete plot event.
Chapter 467, "Your Boars Have All Run Back!", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. A useful checkpoint is the way the scene starts with He had recently been meditating on how to accomplish the tasks...
Chapter 447, "Going Viral on the Internet", is the clearest early answer because it turns Shen Lan's situation into a concrete plot event. The chapter turns that into something concrete by moving from Old Sir Jiang: "...." His face had grown even worse.