My Son Is 5yrs Old. He Recently Seen By A

My son is 5yrs old. he recently seen by a doctor for constipation problems. He can hold his stool for 3wks and doesn't seem to be uncomfortable at all. We have been giving him restoralax to help him to go every day for about 1 month..He is going more regularly, but now he is burping several times a day. Do you think the 2 are related ?