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COMMON SYMPTOMS AND CAUSES
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Ears
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Itching, redness, discharge, or odor: Ear infection, ear mites, allergies, wax buildup, tumor
Swelling: Ear cancer, abscess, hematoma
Hearing loss: Deafness
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Eyes
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Discharge, redness, or swelling: Eye infection, allergies, conjunctivitis (pink eye), upper respiratory infection, corneal disorders, dry eye, feline infectious peritonitis, feline AIDS, leukemia, distemper, glaucoma, eye defects, eye injury
Clouding: Eye infection, eye defects, corneal disease, tumor
Jaundice (yellowing): Liver disease, feline infectious peritonitis, infection, heart tumor, stem cell disorders
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Mouth
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Abnormal gum color: Heart disease, heart failure, anemia, cancer, distemper, feline AIDS, leukemia, kidney disease, poisoning, upper respiratory infection
Bad breath: Gingivitis, gum disease, mouth ulcer, cavities, tumor, gastrointestinal problems, liver disease, kidney disease, retained deciduous teeth
Bleeding: Gingivitis, mouth cancer, ulcer, tumor, jaw fracture
Difficulty breathing or coughing: Pneumonia, anemia, heartworm disease, upper respiratory infection, hyperthyroidism, feline infectious peritonitis, heart problems (disease, failure, murmur, or cancer), poisoning, bronchitis, asthma, lung cancer, fungal infections, hernia, foreign object in throat
Difficulty swallowing: Dental infection; mouth infection; hyperthyroidism; tonsil, thyroid, or throat cancer; tonsillitis; sore throat; foreign object in throat
Drooling: Rabies, upper respiratory infection, feline AIDS, mouth, tonsil, or tongue cancer, tooth fracture, kidney disease, ulcers, gum disease, cavities, heat stroke, epilepsy
Vomiting: Swallowing something indigestible, rushed eating, distemper, intestinal parasites, allergies, heartworm disease, infection, poisoning, tonsillitis, inflammatory bowel disease, leukemia, kidney disease, liver disease, pancreatitis, epilepsy
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Nose
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Bleeding: Injury, foreign object stuck in nose, infection, tumor, parasites, clotting disorder, cancer
Sneezing or discharge: Bacterial, fungal, or viral infections (especially feline herpes virus and feline calicivirus), upper respiratory infection, allergies, feline infectious peritonitis, feline AIDS, leukemia, chlamydia, bordetella
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Head
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Shaking: Ear mites, ear infection, kidney stones
Swelling: Allergies, insect bite
Tilting: Rabies, vestibular disorders, meningitis, tumor
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Skin and Hair
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Chewing, licking, scratching, flaking, or redness: Parasites, allergies, dry skin, skin irritation, infection, kidney disease, pain, anxiety, boredom
Hair loss: Hyperthyroidism, parasites, allergies, skin irritation, ringworm, alopecia, ulcer, infection
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Urinary
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Blood in urine: Urinary tract infection, kidney disease, cancer, diabetes, feline urinary tract disease, fungal infection
Frequent, painful, or strained urination: Urinary tract infection, hyperthyroidism, diabetes, bladder stones, feline urinary tract disease, liver disease, kidney disease, cancer
Incontinence or going outside of the litter box: Aging, kidney disease, urinary tract infection, feline urinary tract disease, bladder stones, congenital defect of the uterus, spinal cord injury
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Bowel
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Blood in stool: Stomach or intestinal bleeding, inflammatory bowel disease, irritable bowel syndrome, poisoning, parasites, infection, ulcer, leukemia
Constipation: Dehydration, hairballs, tumor, colitis, feline urinary tract disease
Diarrhea: Food allergies/intolerance, heartworm disease, inflammatory bowel disease, kidney disease, irritable bowel syndrome, colitis, hyperthyroidism, parasites, cancer, pancreatitis
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Abdominal
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Pain: Urinary tract or intestinal obstruction, bladder rupture, trauma, poisoning, feline infectious peritonitis, liver disease, cancer
Swelling or distention: Foreign body in gastrointestinal tract, tumor, hernia, heart disease, feline infectious peritonitis
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Behavioral
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Aggression: Rabies, poisoning
Disorientation or loss of balance: Rabies, vestibular disorder, hypoglycemia, high blood pressure, liver disease, brain injury, brain parasites, epilepsy
Increased thirst: Kidney disease, hyperthyroidism, liver disease, diabetes, bacterial infection, poisoning
Lack of appetite or weight loss: Upper respiratory infection, heartworm disease, pancreatitis, hyperthyroidism, feline infectious peritonitis, feline AIDS, kidney failure, cancer, liver disease, intestinal problems, parasites, pneumonia, distemper, toothache, recent vaccination
Lethargy, weakness, depression, or hiding: Heart disease, heart failure, heart murmur, heartworm disease, cancer, feline infectious peritonitis, feline AIDS, feline herpes, kidney failure, lyme disease, anemia, pneumonia, infection, arthritis, hip dysplasia, poisoning, tumor, pancreatitis, diabetes, liver disease, distemper
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Other
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Fever: Bacterial, viral, or fungal infection, distemper, upper respiratory infection, feline infectious peritonitis, injury, tumor, pancreatitis
Lameness or limping: Injury, arthritis, infection, lyme disease, hip dysplasia, cancer, muscle disorder
Paralysis: Spinal cord injury, rabies, heart disease, heart failure, tumor, poisoning
Seizure: Poisoning, head injury, kidney failure, liver failure, epilepsy
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