Hi Your husband seems to have developed a bruise initially due to the fall that he had. A bruise appears like a reddish or purplish area to the eyes. But since the area is increasing now in size along with development of a yellowish centre, then this is not a very favourable sign. This signifies development of an infection at the site of injury. I would advise you to see a nearby doctor so that proper assessment can be done to rule out the possibility of cellulitis . If this is the case , then a course of oral antibiotics might be required . Dr Geetika Paul