For example, a complete blood count can provide information about red and white blood cells.
Low hemoglobin may suggest anemia, which can occur for a variety of reasons and requires further interpretation.
Tests measuring inflammation may sometimes support the investigation of certain diseases, although they cannot identify a trichobezoar by themselves.
Depending on the situation, clinicians may also assess kidney and liver function, electrolyte balance, urine findings, or conditions such as celiac disease.
Not every teenager needs all of these investigations.
Doctors choose tests based on symptoms and clinical findings rather than ordering every available procedure automatically.
This principle helps reduce unnecessary discomfort, cost, and confusion.
The role of ultrasound and medical imaging
When a structural problem is suspected, imaging can provide valuable information.
Ultrasound is frequently useful in children because it creates images using sound waves rather than ionizing radiation.
It can help clinicians assess certain abdominal organs and investigate possible causes of pain.
