How can a part-time job affect a high school student's health?

It can affect you by adding stress, which is not necessarily a bad thing; it just depends on how well you cope with stress and how much stress you already have in your life.

Depending on the number of hours you are working, plus the hours of school and homework, and any added responsibilities you may have at home, it can reduce the number of hours you are able to sleep. This can affect mood, alertness, ability to think quickly and remember clearly, and your immune system. Some studies have suggested that teens need 8-1/2 to 10 hours of sleep for optimal health.

On the positive side, having a job can lead to increased self-esteem and good mental health by increasing your chances of making friends and work-related contacts, givig you the feeling that you are contributing to something worthwhile, and helping you to form self identity. The added income also allows greater independence.

Technically yes…but if it is then you’re doing it wrong. I held a Job for 2 years of high school and I was in perfect health. so if your health is affected the most likely reason is either you’re overly stressed about school or you’re in a job that isn’t good for you. Either way you might want to consider leaving your current job