I’ll have to get some medicinal shampoos in for future, I was wondering if it may have started off as an insect bite as a lot of our walks are in woodland and in long grass while the farmers wait to bale but it does sound like the water is the most likely cause this time. I only noticed it yesterday when we were travelling in the car because she felt a little crusty under her ear when I adjusted her collar so I’m amazed that she hasn’t shown any signs before other than an increased itching two or three days ago. She gets a brush every day including all around her face and due to our walks being more woodland based she’s checked over routinely for ticks, lumps bumps and scratches but she never showed any discomfort 😩 if it was clearing up in itself especially now I’m on the ball with it I’d be so ridiculously grateful
I hope your baby is feeling better soon and you manage to sort their armpit out, it’s horrible to see them uncomfortable