why doesn't sasuke get a new arm

In the fanfic, it could be that Sakura has her own reasons for not speaking to Sasuke. She might be trying to protect him in a strange way. She could think that by not speaking to him, she can keep him at a distance from some danger that she anticipates. It's a rather self - sacrificing act on her part.

It could also be because of the fans' personal preferences. They may not like the idea of Sasuke and Sakura being together. So they create fanfictions where Sasuke doesn't love Sakura to satisfy their own vision of how the story could be. They might be fans of other pairings involving Sasuke or just don't think Sakura is a good match for him based on their understanding of the characters' personalities.

In the fanfic, Sakura might not speak to Sasuke because of a past misunderstanding. Maybe Sasuke did something that Sakura misinterpreted, and she's so hurt that she refuses to talk to him.

Maybe the author doesn't like the idea of Harry being part of Quidditch - related fanfic. It could be that they want to focus on other aspects of his character or other parts of the Harry Potter world.

Maybe she lives in a place with constant bad weather or is trapped indoors for some reason.

The plot could be less centered around Sasuke's struggle with the curse mark's power and Orochimaru. Maybe there would be more focus on his normal ninja training and missions with Team 7. For example, he could be more involved in regular village protection tasks instead of being preoccupied with the curse mark.

There could be various reasons. It might be due to market conditions, lack of resources, or they simply want to take a break and recharge their creative juices before embarking on new literary endeavors.

Perhaps there haven't been enough interesting events or news to cover recently. Or maybe they're reworking their editorial process and it's causing a delay in new story publication.

I don't know who Diwu Dugu is, and I don't have any information about him or her updating novels. If you have more information, I can try my best to answer your questions.

A hard lump on an arm or leg that didn't hurt or itch could be caused by lipomas, dermoids, desmoids, and other reasons. Lipomas were a common benign tumor of soft tissue. They usually appeared on the back, shoulders, and near the limbs, such as the upper arms or thighs. They could cause local lumps and swelling. Dermoids may be caused by inflammation or trauma. Most people have no obvious symptoms, but larger blisters may cause hard bumps that don't hurt or itch. Desmoids were a rare soft tissue tumor that usually grew slowly and did not feel any pain. If the lump was not painful or itchy and did not move, it could also be a bone wart. If the lump had a certain elasticity and could be felt moving, it might be a subcuticular keratodermic node, which needed to be removed by skin surgery. Ordinary warts could also cause hard lumps, which were usually caused by viral infection. It is recommended to visit the hospital in time to obtain accurate diagnosis and treatment suggestions.