A cat's anal glands naturally express a scent-marking liquid when they defecate or rub their hind end on the ground. When the duct inside the gland becomes inflamed or swollen, an impaction may occur that prevents the fluid from escaping. This can be painful for your cat and lead to further problems and infections. Assuming your cat has been examined by a vet, with no problems found with the anal sacs, you expressing a cats anal sacks help by manually expressing the anal blast lyrics sacs. It's not the most enjoyable experience for you expressing a cats anal sacks the cat, but it is necessary for your cat's health. Though your vet can do it, you can save money by doing the procedure at home. It is important to understand the function of anal glands also known as anal sacs in cats.