It has been reported that the likelihood of developing allergic diseases, strabismus, hip joint dislocation, neuropsychiatric disorders, etc. varies depending on the season of birth.The research group has previously investigated the onset of atopic dermatitis up to the age of 3, and found that children born in autumn had more cases of atopic dermatitis than children born in spring.

　This time, 81,615 children participating in a national survey on children's health and the environment (Eco-Children's Survey) were surveyed to find out how early the relationship between the season of birth and the onset of atopic dermatitis and eczema in infancy was observed. I considered whether it would be possible.

　As a result, 1-month-old eczema was most common in July-borns, 7-month-old eczema was most common in November-borns, and 6-year-olds with eczema and atopic dermatitis were most common in October-borns.It was found that children born in autumn tend to develop eczema and atopic dermatitis after 11 months of age.

　In addition, regardless of the mother's history of allergies, more boys born in the spring than those born in the fall are more likely to develop atopic dermatitis. rice field.In addition, boys with a mother's allergy history were more likely to develop atopic dermatitis even if they were born in the summer.

　Even with the above risks, it may be possible to prevent the onset of the disease through appropriate skin care at an early stage.This time, the research was based on a parental-answered questionnaire, so there was a certain amount of perspective in the research.In the future, it is necessary to investigate the relationship with various factors that change seasonally so that the onset of atopic dermatitis can be prevented regardless of the season.

Paper information:[BMC Pediatrics] Season of birth and atopic dermatitis in early infancy: results from the Japan Environment and Children's Study