Thanks for writing to health care magic.
One this you should monitor is he should not go into dehydration
because of loose stool
Monitor for signs of dehydration.
1. Decreased skin turgor
2. Increasing thirst.
3. Sunken eyes.
6. Decreasing passage of urine.
So replacement of fluid is important.
You may give ORS or any other fluid containing salt and sugar.
Second problem is diaper rash
. Stop using diaper. Change the diaper frequently. Do not use the soap to clean the area. If the baby is lactose intolerant then one should stop using milk.
Hope this helps.