Generally, credits will not be deducted because of leave. If you need to ask for leave due to physical discomfort, you should ask a doctor for a certificate, write a sick note and ask the counselor for leave.
Credit is a unit of measurement used to calculate students' learning volume. Calculated by semester, the specific academic achievements of each course and practice link shall be subject to the provisions of the professional teaching plan. Some schools also have a system of charging by credit. Credits can be used to judge the breadth of knowledge learned by students during their college years. The more credits students get, the more things they learn.