My baby is 18months old...for last few days he is having itchness around his anus..during this i used to apply home made coconut oil to that area for relief..i had dewormed him on march 12th when he was 14months old..now due to teething he always put his hands in mouth ..he will always be inside play pen and he never plays outside as we are living in flat ..is that itchness due to worms..i cant find anything in his poop though..should i deworm him again..will applying coconut oil helps? He poops 2-3times a day ..usualy after having food