Hello, I understand your concern Your baby is otherwise healthy, feeding well, gaining weight, and passing urine and stools regularly. The crying is very distressing, but this pattern is typical of infantile colic, which is common at this age and improves on its own with time. Peak colic age is 6–8 weeks, and it can cause crying spells for >3 hours a day, typically in the evening. It is common, benign, and self-limiting, usually improving by 3–4 months of age.