Is this something that just happened, or has it been going on for a while? The pictures just aren't clear enough to really tell. If you suspect a bite or sting, then you can give 1/4 of a 25mg benadryl tablet and give it once in 24 hours to see if it reduces. Don't give more than once, or overdose. I will also often apply a poultice of echinacea angustifolia to the site. It may be difficult to get it to stay on the comb however, if she shakes her head. You can find in in capsules, but there are several types of echinacea, so make sure to get the correct one for best results (purpurea is most common, it will not have the same results). Make a paste with warm water with the contents of the capsules and apply to the area (it won't hurt her if she eats the paste). Then I usually cover with a small bit of plastic wrap and then bandage over it, to keep it moist and hold it on. It needs to stay on for as long as you can keep it there, several hours at least. If you can figure how to do that on that particular area, then in might help. A bit of gauze kept moist would work also, without using the plastic wrap, you would need to re moisten as necessary.
