After subcutaneous fluid therapy my cat developed a large lump of fluid on his right side and he is now hiding under the bed. He yowled when I tried to pick him up, as if the bubble of fluid is painful. What could be the problem? I give him 250ml of lactated ringers every 7-10 days. This was the third fluid delivery and this has never happened before. I had to adjust the needle placement several times but did not replace it. Could I have introduced an infection? Could it be fluid overload?

Updated On December 25th, 2023

Pet's info: Cat | American Shorthair | Male | neutered | 18 years and 9 months old | 9 lbs

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Thank you for contacting PetCoach with your question about George. It is normal to have a lump of fluid develop where the subcutaneous fluids were given. This pocket of fluid will be absorbed over the next couple of hours. As long as you used a new needle to give the fluids, it is not likely you introduced an infection; even if you did, it would show up immediately. The lump will be due to the fluids, and again it is normal. It may feel a big uncomfortable to him for now, and I'd leave him be and let him hide. It should resolve in a few hours. I hope this helps.

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