Actually, it's better to take time off in college. Teachers rarely call home to confirm before releasing them, as in junior high school and high school, especially in senior three, except for people who are closely related to you. In college, we can be responsible for our actions. As long as you and the teacher explain clearly why you need to take time off, we will definitely give you a vacation as appropriate.
When you need to be hospitalized for observation for a period of time, you can apply to the responsible teacher for additional holidays with the medical certificate issued by the doctor. After all, it is impossible to go home for treatment without family care. Of course, you can also let your family come, but if your family can't leave, you can only be allowed to take time off. Learning can make up for it, but health can't afford it.
If you really want to take a few days off, you can find out if anyone in your family is getting married and having children, so that you can talk about your relationship with someone who is getting married recently. Tell the teacher that when you need your current identity, you have to be present at all these things, otherwise it is unreasonable. Just like you are the younger brother of the bride, in some places, it is a custom that the younger brother must send his younger sister to get married. Otherwise, it will be unlucky, provided that you and your parents agree on the reasons in advance, and it will not look good if the teacher calls.
Asking for leave is not necessarily a good idea. As long as you really have something to do instead of playing games and meeting netizens, you will get the teacher's approval. Even if you don't approve, you will be responsible for it.