My son is 1 month and one week old. I alternate between diapers and cloth nappies for him. And I change diapers every 3-4 hours or immediately if I realize that he has pooped. I recently noticed a redness around his anus. Is it a rash? There is no other redness on his butt except for this. Additionally, he has a habit of putting a lot of pressure while pooping or leaving gas even though he is not constipated. Could the redness be as a result of this? If so, is there a risk of further injury? Please advise.