In the past, Pirate King Gol D. Roger has suffered from an incurable incurable disease. Gol D. Roger is known as the Pirate King. He is th...

In the past, Pirate King Gol D. Roger has suffered from an incurable incurable disease.
Gol D. Roger is known as the Pirate King. He is the captain of the Roger Pirates. It is the only pirate crew to the end of the journey and is the owner of the legendary One Piece pirate treasure. Roger was dubbed a "legend", possessing tremendous power. He really rocked the whole pirate world. Even the world government must be afraid, wary of him.

But in the past, Roger had an incurable disease incurable. Because of this, after fulfilling his desire to find treasure and go through the Grand Line, he disbanded the pirate crew and surrendered himself to the Navy to open a new era for the pirate world.
So what exactly is his illness that cannot be cured? And why did he suffer from this dangerous disease? Let's find out this issue today. However, this is just a personal opinion, people only read it for reference only.
1. The disease may be caused by the legendary pirate Rocks D Xebec

Rocks D. Xebec is known as the legendary pirate captain Rocks. According to Sengoku, Rocks is the first and possibly the greatest enemy of the former Pirate King Roger.
In the past, because Rocks wanted to dominate the world, he and his crew devastated and attacked many locations in the New World and left a series of destruction. So Vice Admiral Garp shook hands with the Roger Pirates together to suppress the Rocks Ice on God Valley Island.
Currently, the true power and abilities of Rocks have not been revealed. But it is clear that he is one of the most powerful characters ever. That's why it was suggested that during the historic battle 38 years ago, after defeating Rocks, Roger was seriously injured and something happened that affected his health.
2. Roger was hit by the "curse" of the Devil Fruit

Still, according to the theory, if Roger's illness was not caused by Rocks 'strong attack during the battle in God Valley, what would happen if Rogers' illness was caused by the power of Rocks?
What do people think of when Rocks has the ability of a Devil Fruit can put a curse on his opponent. When he killed Rocks, Roger was affected by this ability, which caused him to suffer an incurable disease.
Surely anyone who is a Japanese anime fan will see many similarities between the popular anime One Piece and Naruto. Recently Naruto's sequel Boruto introduced readers a new ninjutsu, the Karama seal. As everyone knows Karma is a cursed seal given to those who killed an Otsutsuki clan member. Although it gives the possessor powerful powers, it also makes its owner "slowly die in pain".
Could this episode be repeated in One Piece and that was the cause of Roger 's incurable disease?
3. Roger has a genetic disease closely related to the mysterious "D"

So far, Oda has not revealed to us the meaning of this mysterious D. But there is one thing in common that any fan can recognize. That is, all the people who carry the D in their names have a "dreamy roots" connection, if not "descendants of their fathers" then their fates.
So what do people think when Roger got a genetic disease that is closely related to the mysterious D in his surname. And perhaps it is a disease that some members of the D family will have to face. Because of its incurable nature, hardly anyone can survive this disease.
If this is true, then is it likely that Monkey D. Luffy will suffer from the same disease in the future because he is considered to be the heir of the will of Gol D. Roger?
4. Roger was poisoned by a crew member
This is the smallest possible cause of Roger's disease. However, in One Piece, nothing is impossible.
On Whitebeard's ship, he was betrayed by Blackbeard, who killed his teammates to steal the Devil Fruit Yami Yami no Mi. Not only that, Teach later plans to kill the "Daddy" and take away the evil Gura Gura no Mi.
So what happens when a member of Roger's ship also has such a traitor? He silently poisoned his captain in order to carry out some evil ploy. Or more catastrophically when he was the remnant of the Rocks Pirates in the past, because he wanted to get revenge, so he merged with the Roger Pirates to kill our former Pirate King.
Ms. Phoenix