It is very common for babies to experience intestinal colic, especially because the gastrointestinal system of a 40-day-old baby is not yet fully developed. In such cases, you can perform a clockwise massage on the child's abdomen, centered around the navel, for ten minutes each time. You can also do some gas relief exercises for the child, which are beneficial in alleviating intestinal colic.

Additionally, you can hold the child in an airplane hold, or use a warm towel to apply heat to the baby's abdomen to relieve intestinal spasms and colic. If the baby's intestinal colic remains particularly severe, it may be necessary to administer some medications that adjust the intestinal flora. Also, it is advisable to engage the child in more outdoor activities to prevent crying due to calcium deficiency.