My baby is 42 days old he does poopoo once a day and also sleeps less like he is awake all day. no problem with appetite. why he doesn't sleep?

Not unusual: Around 6 to 8 weeks of age, babies tend to become more alert with less sleep during the day and more sleep at night. Regarding bowel movements, diet may be a big factor. Breast fed babies sometimes only have bowel movements once every day or two. Unless the bowel movements are very firm, possibly a sign of constipation, this is fairly normal. As always, check with your pediatrician if in doubt.