Hi and thanks for the query, It is most probable that this should be an allergic reaction to something, most probably an insect or parasite somewhere around that you might not have identified yet. the classical redness and pain are signs of an acute inflammatory/allergic reaction. Washing and ironing all their dresses and bedding before putting them on could be an initial first step. searching the room, effective cleaning and airing of the room could be very helpful in case this could be some acarians parasite in the room. Having a careful recall of sites they visited lately or played around which they were not used to visiting could actually help too. Persistence, intensification or more sever symptoms should prompt consultation with the family physician. It really should be very far from a demonic or spiritual attack. Thanks and hope this helps. Kind regards, Bain LE, MD.