What is the situation when a five-year-old child loses hair?

Patient's question:

Patient Age: Five years old
This summer, when taking a foaming bath, hair fell out.
Took calcium gluconate.
What kind of help is needed: Guess the cause and countermeasures

Doctor's answer:

Acne in children is mostly based on alopecia areata. Most children develop acne due to excessive academic pressure, high stress, or a lack of trace elements. If a child experiences acne again, they should visit the hospital immediately for a follow-up and undergo a detailed trace element check, as zinc and iron deficiencies can also cause acne.
Recommendation: For pediatric acne, conventional treatment should be the foundation, as the condition is relatively easy to treat with a very good prognosis. It is understood that helium-neon laser treatment may be particularly effective.