Article in English: While spraying is usually a behavioral problem, if making certain household adjustments does not resolve the issue a trip to the vet is needed. A basic exam can rule out or identify and treat any medical problems that may be causing the spraying. Bladder control issues, especially in older cats, can be a sign of serious problems like organ failure. If your cat is not fixed, this may be what's causing the spraying as the behavior is used to advertise to mates. Spraying is a sign of sexual maturity in cats, and having your cat fixed can stop the behavior.  If possible, have your cat neutered before he is 6 months old. More than 90% of cats will not start spraying if they're fixed in this time frame.  In older cats, roughly 87% will stop spraying after being neutered. While the majority stop immediately, a little under 10% will take a few months to cease spraying. Spraying, even when caused by stress or anxiety, can be treated with certain medications prescribed by a veterinary professional.  Anti-depressants and anti-anxiety medications, given orally, can be obtained by consulting your vet. These can ease tensions caused by a multiple cat household or anxiety caused by an erratic schedule.  Always consult with a veterinarian, and know your cats medical history. Certain medical issues can interact poorly with medications.  All medication has potential side effects. Ask your vet what side effects to look for, and how severe such side affects are, before giving your cat any meds.

Summary in Vietnamese:
Nhờ bác sĩ thú y kiểm tra. Triệt sản cho mèo. Tìm sự hỗ trợ của thuốc men.