Without a moderate level of anxiety you likely wouldn’t care about the consequences of failing to eat healthy or workout, failing to study for an exam, failing to practice good hygiene, etc.
Anxiety becomes problematic when:
It becomes persistent
It is overwhelming
It interferes with your everyday life
It is accompanied by physical symptoms such as dizziness, muscle tension, difficulty breathing, rapid heart rate, numbness, etc.
Being a student is an incredibly stressful time in life. Some common contributors to anxiety in students include financial pressures, being constantly evaluated academically, living up to the expectations of loved ones, being involved in a serious relationship, and having to make decisions that will impact your career.
Some natural strategies to help reduce anxiety include:
Reducing the pressure you place on yourself by setting realistic goals
Getting adequate sleep
Reducing your intake of sugar, caffeine, alcohol, and tobacco
Drinking more water and eating more vegetables and protein
Learning and practicing some form of deep relaxation including yoga
Reminding yourself of your accomplishments (rather than focusing on all that is yet to be done)
When anxiety surpasses a healthy level, it is very treatable with psychotherapy, medication, or some combination of the two.