It depends on what you mean by “starting a thread.”
If you are referring to starting a conversation thread on an online forum or social media platform, then generally speaking, you can start multiple threads on the same topic or issue. However, it may not be considered good etiquette to start multiple threads about the exact same topic, as it can lead to confusion and clutter on the platform.
If you are referring to starting a physical thread, such as with a needle and thread for sewing, then technically you can start a thread twice, but it may not be efficient or effective. When starting a thread, it is important to ensure that the thread is properly secured in place to prevent it from unraveling. If you start a thread and then cut it or remove it before it is secured, you may need to start a new thread from scratch to avoid any issues with the final product.