Possible urinary blockage. If that is what it is, it can be life threatening very fast. Can you feel a full bladder? You might call a nighttime vet and describe what's going on and see if they think it can wait until morning to see your regular vet.
Your cat may have a problem called Feline Lower Urinary Tract Disease (FLUTD) It happens when crystals are formed in the bladder which block the urethra. Male cats are affected more commonly than females, as they have a longer urethra. Basically, the crystals sit inside the urethra, and stop the cat from unrinating. The bladder fills up and distents, causing pain and distress. The cat feels like he needs to go to the toilet desperarely, and keeps on trying, but is unable to pass enough urine to alleviate the problem. The dangers are many - urine can wash backwards towards the kidneys causing infection and kidney failure. There is also the rare problem of rupture of the bladder. In any case, the cat is usually very distressed, and in considerable pain (Imagine how you would feel if you were busting to wee but couldn't)
The only cure for FLUTD is veterinary treatment. Get him assessed as soon as you can to see if this is the problem.
Copyright 1994-2016 MedHelp International. All rights reserved.
MedHelp is a division of Aptus Health.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.