Bruises in cats are commonly caused by parasites, and injuries. Parasites which feed on blood such as worms, fleas, and ticks can tend to leave the purple blotches. A cat bruise can be caused by injury (even the ones from cat fights) usually occur where fur is less dense, such as the area surrounding the eyes. Check for parasites by simply finger combing through your cat's fur. If you do find worms, fleas, or ticks, it is best if you start fighting these parasites immediately before they cause health problems such as anemia in your feline friend. A recommended method of treating bruises involves the use of an ice pack. The cool temperature will prevent further bruising while constricting the blood vessels. Once the bruise has fully formed, you may apply a warm press or a heated wash cloth to the bruise. The warmth soothes the bruise and relieves minor soreness.
Sprains in cats are usually caused by traumatic events. Car accidents, fights with other animals, falls, and even running and exercise, can cause strains to occur. Sprains should always be taken care of at the veterinarian's office. Veterinarians usually conduct a physical examination to determine the severity of the sprain. Splints are often used to correct sprains and to ensure that the joint heals properly. Limping, swelling, and pain are all indicators of a sprain.