Lactos intolerance in infants. Resolved!

Looks like it is Secondary lactose intolerance so this can be be alright by 4 weeks usually

Greetings True lactose intolerance is highly uncommon in infants under 2 to 3 years old, and a baby's ongoing fussiness or gas after diarrhea usually points to a temporary, secondary lactase deficiency caused by an irritated intestinal lining. True congenital lactose intolerance is exceptionally rare, whereas a secondary deficiency resembles a brief gut imbalance that generally self-corrects and resolves within 4 to 8 weeks as the intestinal mucosa completely heals. Alternatively, the persistent digestive distress and fussiness might stem from a cow's milk protein allergy (CMPA) or a temporary sensitivity to the specific proteins found in her infant formula. Managing a temporary secondary deficiency typically involves feeding specialized, over-the-counter lactose-free infant formulas or hypoallergenic formulas under a doctor's care, alongside a clinical evaluation of her ongoing symptoms.

Secondary lactose intolerance is not s big problem. Normalcy will come back in 2-3 weeks time. Breast milk can be continued. Primary lactose intolerance is very rare. It is mostly not the case.

If persistent problem Pediatric GE consultation may be required.