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A small red patch showed up on my dog's leg after a swim, and I did what seemed right, I dried it with a towel and kept an eye on it. Two weeks later it was an angry wet sore the size of a coin, hair gone around it, and he was licking it raw, a patch I had been trying to help that I had been quietly making worse.
The swim was a hot July afternoon, the river low and the dog happy, and the patch started as a faint pink spot I noticed when I was toweling him off, the kind of thing you assume will dry and vanish because most things do. I dried it, I moved on, and the next day it was a little redder, and I dried it again, and that second drying was the start of the mistake.
The mistake was the drying. A hot spot is a moist dermatitis, a spot that stays damp under the coat and breeds bacteria, and my towel dried the surface while the air could not reach the skin, so the damp underneath kept feeding it. I was solving the symptom I could see and feeding the cause I could not, and the coin grew because the environment stayed wrong.
The vet cleaned it, clipped the fur around it so the air finally got in, and gave a topical that knocked the bacteria back. The clipping was the real fix, because the hair was holding the moisture like a lid, and once it was gone the spot could dry the way it needed to, from the inside out instead of the outside in. I had been keeping the lid on without knowing.
Licking was the other engine. He licked because it itched, and the licking kept it wet and introduced more bacteria, a loop that only a cone could break. I resisted the cone on principle, which was pride, and the sore kept weeping until the cone went on and the tongue finally lost access. The cone is ugly and the dog hates it, and it is often the thing that ends the loop, which is the only vote that counts.
What I should have done at day one was clip and air, not towel and watch. A hot spot wants exposure and a barrier from the tongue, and everything else is decoration. The swimming started it, the trapped moisture grew it, and my good intentions kept the trap closed until a professional opened it.
The healing took another ten days once the lid was off, the sore drying to a scab and the hair slowly coming back in a pale patch that still marks the spot. He does not lick it now, the cone came off, and the river is still allowed, but the toweling now ends with a look and a parting of the fur, because a damp dog in a warm coat is a hot spot waiting to happen and I am done being the one who feeds it.
Prevention is the dry dog after the wet one. Towel thoroughly, then air, then check the spots under the legs and behind the ears where water hides, because a damp dog in a warm coat is a hot spot waiting to happen. I dry now and then I look, and the coin-sized disaster has not come back since the lesson landed, which was more expensive than it needed to be.
If your dog has a wet red patch, do not towel it and wait. Clip the fur, get air on it, block the licking, and if it is past day two or spreading, the vet is the call. I spent two weeks drying the wrong thing, and the skin paid for my confidence, a mistake I will not repeat because the sore taught it better than any book.
The cone period had its comedy. He walked into the wall, got stuck in the hallway, and learned to drink by lowering his whole head to the bowl like a crane, a dignified animal reduced to a lampshade with a routine, and I laughed, and then felt bad, and then laughed again, because the cone is funny and necessary and he wore it like a sentence he had earned by licking.
Now the river is still on the schedule but the toweling ends with a part and a look, and the spot under his leg gets air before it gets a lid, and the coin-sized sore has not returned. A hot spot is a small disaster that teaches a large lesson about moisture and access, and I was the moisture and the access both, the one who dried the wrong thing and then kept the tongue on it, and the skin has not forgiven me by forgetting, only by healing.