It's crucial to contact your veterinarian immediately.
Here's why:
* Multiple possible causes: Vomiting white stuff can be due to various reasons, some minor (like hairballs), others serious (like infections or organ problems).
* Urgent medical attention: Depending on the cause, prompt veterinary care can make a huge difference in your cat's health.
* Accurate diagnosis: A vet can perform tests to identify the cause and provide appropriate treatment.
In the meantime, you can observe your cat's behavior and take note of:
* Frequency and amount of vomiting
* Presence of other symptoms: diarrhea, lethargy, loss of appetite, weight loss
* Anything unusual in your cat's diet
It's important to remember: Never self-medicate your cat or try to treat them without professional advice.