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Question:

White clear thing in cats bum after using flea treatment Bravecto

Help, I'm really worried! I recently applied Bravecto flea treatment on my cat, Luna, and everything seemed fine for the first day. But today, I noticed something strange: there's this small, white-clear thing sticking out from her bum. It's almost translucent and I'm not sure whether it's related to the flea medicine or something else entirely. Luna seems okay behavior-wise; she’s eating, playing, and sleeping as usual, but I can't shake this uneasy feeling. I don't want to overreact, but I can't ignore it either. Has anyone else experienced this with their cats after using Bravecto or similar flea treatments? Any advice on what this could be or what I should do next would be really appreciated. I'm trying to decide whether a vet visit is necessary or if I'm just being overly concerned. Thanks so much for any guidance you can provide!

Answer:

Thanks for the question. It sounds like you’re describing something unusual you're noticing near your cat’s rear end after using Bravecto, a topical flea treatment. Let's try to unravel this. It's not uncommon for cats to have a bit of discharge or debris around their anus, but since this appeared after the flea treatment, a few possibilities come to mind.



The white clear substance might be unrelated to the Bravecto and could simply be anal gland secretions, which cats naturally produce. Sometimes, these glands can become expressed due to stress or irritation. Another possibility is that your cat might be having a mild skin reaction to the medication, especially if the substance is more jelly-like.



To help at home, gently clean the area with warm water and a soft cloth. Avoid using harsh soaps or chemicals, as these can further irritate sensitive skin.



Keep an eye out for signs of distress, like excessive licking or dragging their rear on the floor, as these could indicate discomfort. Also, watch for persistent redness, swelling, or any sign of infection, such as pus or a foul odor. If you notice these, or if your cat seems lethargic or is eating less, it’s time to get professional help.



Consider booking a video consult with one of our vets here on Dial A Vet for personalized advice and peace of mind. We're here to help you and your feline friend!

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 26, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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