A two-month-old baby who doesn’t poop and puts out smelly farts may be a normal physiological phenomenon, or it may be caused by a disease. If it is caused by disease, you need to go to the hospital in time to receive relevant examination and treatment. Such as changing milk powder, use of corkscrew and so on. 1. Physiological phenomenon: two-month-old babies usually eat breast milk or milk powder, breast milk and milk powder contains a lot of lactose, lactose decomposition will produce gas, so the baby will let out smelly farts. If the two-month-old baby has already pooped on that day, and now does not poop, but only smelly farts may be because the previous has finished, you can change the milk powder to avoid this situation. 2. Disease: If the baby has not had a bowel movement for 1 to 2 days, but has been letting out smelly farts, it may be caused by a disease, such as constipation. If constipation causes the baby does not poop, only smelly farts, you need to go to the hospital in a timely manner, it is recommended that the application of probiotics under the guidance of the doctor, such as bacillus subtilis bacillus granules, and so on. If the baby does not poop and only releases smelly farts for more than one day, you should bring your baby to the hospital in time to clarify the cause of the disease and treat it as soon as possible.