Daughter always cries before going to sleep at night, but after examination, there are no abnormalities. How to solve this?

Patient's question:

3-year-old daughter has been crying before taking her nap these days; sometimes she also cries in the middle of the night;; When I ask her, she doesn't say anything; she just rubs her eyes;; I took her to the hospital and had an electroencephalogram and brain CT done;; The doctor said it's nothing;; Previous treatment history and effectiveness: Careful examination showed no abnormalities;; What kind of assistance has been obtained: Not much assistance

Doctor's answer:

The baby is experiencing the above symptoms again, which are likely related to calcium deficiency. Calcium deficiency in babies can manifest as irritability, night sweats, frequent waking at night, and crying at night, among other symptoms. A trace element test can be conducted for diagnosis.
Advice: It is recommended to give the baby more calcium-rich foods, such as oral calcium supplements like calcium carbonate, and to take vitamin D together to enhance calcium absorption. Wishing the baby healthy growth.
The above advice is for the question "My 6-year-old daughter has been crying before taking her afternoon nap these days." It is hoped to be helpful to you. Wishing you good health!