Perhaps google this and see if it correlates to what he’s experiencing - Angular cheilitis. I have had it myself and looks a little similar
aw poor baby looks painful. would take him to the dr for proper diagnosis
Thank you everyone. Dr said it’s angular cheilitis so has some cream for it x
Its Vitamin B12 deficiency.
I’m not 100% sure but it might be a cold sore. You could try some cold sore cream. That will sooth it within 24 hrs if it is x