Recurring low fever in children can be caused by various factors, including infections, connective tissue diseases, and malignant tumors, among others.

Twitching during sleep in children is often a normal physiological response and not a sign of epilepsy.

Hand and foot twitches in children while sleeping may be due to calcium deficiency, leading to cramps. It is recommended to supplement calcium promptly and get plenty of sunlight. Additionally, it could be related to nerve damage, requiring a visit to a neurology department for examination and treatment, along with acupuncture and medication.

The causes of chromosomal abnormalities may involve congenital heredity or acquired genetic mutations.

A 2-year-old boy suddenly collapsed and convulsed, a situation he had never experienced before. I’m wondering what could cause convulsions?

A reader inquires about the reasons and treatment methods for their child’s difficulty in concentrating and poor memory, as the child has been diagnosed with chronic rhinitis since the age of 4, with symptoms of only runny nose. Now, in first grade, the child is experiencing issues with concentration and memory. The child feels like there are many wires connecting to many light bulbs in their head, making it difficult to memorize during learning, but there are no other abnormalities in daily life.

Down syndrome is a disease caused by chromosomal structural abnormalities, with part of it being due to an extra chromosome.

The primary cause of Down syndrome is an error in the division of the 21st pair of chromosomes during the segregation of heredity, leading to an excess of chromosomes in the cell nucleus.

Down syndrome is primarily caused by chromosomal abnormalities, specifically an extra chromosome 21. This is usually due to incomplete cell division during the formation of the fertilized egg from sperm and egg. If a Down syndrome risk is detected during a mid-pregnancy screening, it may be due to the parents’ age, genetic factors, environmental factors (such as smoking, alcoholism, radiation, etc.), or sporadic genetic mutations. The occurrence of Down syndrome is not necessarily related to family history, as it may arise from new genetic mutations.

What Causes Down Syndrome? Is It Related to Pregnant Women Using Mobile Phones and Computers?