Hi, For the past week or so my dog has been nipping her skin/licking herself and ripping the hair out of her tail. I could see a few small bumps beneath the fur of her tail and consulted a online vet. I was told it was a allergy of some kind, fleas/diet or environment. She’s recently been flead and bathed, her diet has not changed and so that leaves environment. Last year she had hives twice all over her back legs and we were told to just bathe it with warm boiled water. I’ve been doing the same with her tail twice a day with no luck. I’ve heard that many people give their dogs antihistamines but which ones are safe for them to take or any alternatives that could help.