Heidi's ear flap gets really red and kinda stiff every once in a while and it seems really painful. I was wondering if anybody else's dogs have this problem or if anybody might know what the problem is. I took her to the vet for it last time and they gave me some medicine but when they did a culture on the ear canal, there wasn't an infection. She doesn't seem to have yeast or a lot of wax buildup, it's just the flap part that is inflamed. She scratches it constantly and that makes it worse, of course. I put some zymox with hydrocortisone drops in a couple of minutes ago so hopefully this will help. It's just a bummer.