Airborne particles, whether floating in the air or hiding in carpets and bedding, are found in every corner of the room. These tiny things roam around, some so small they're invisible to the naked eye. It's these particles that cause sensitive kittens to sneeze constantly. Owners should regularly clean their homes and air out bedding; a clean home environment is essential for the health of both people and their cats in order to remove these airborne particles. 
The kitten is sneezing frequently, but without fever or other complications. It may just be a bacterial cold. First, keep the kitten warm. For a common cold, you can give the kitten some Pet-Dazs Cough Relief, which should relieve the symptoms in a few days and enhance the kitten's antiviral ability.
Upper respiratory tract infectionWhen a kitten catches a cold and its upper respiratory tract infection becomes severe, it can cause a fever, and a normal sneeze can escalate into a violent cough. Frequent sneezing is caused by infection through the upper respiratory tract. The infection multiplies in the epithelial cells of the kitten's nasal cavity, throat, conjunctiva, and tongue, and is excreted with its secretions.
infected with rhinotracheitisTimely treatment is crucial. Simply giving kittens common cold medicine won't be very effective because feline herpesvirus is highly contagious. First, isolate the kitten and ensure it gets enough food and nutrition during its illness.
If the kitten is not only sneezing but also has conjunctivitis, causing red, swollen, and constantly tearing eyes, give it ganciclovir eye drops and animal-specific A-Parker triple eye ointment to control secondary bacterial infections in the eyes, 4-5 times a day; at night, it also needs to use erythromycin for strong antibacterial and anti-inflammatory effects. Using these eye drops together will improve the symptoms of conjunctivitis.