First Aid for Animal and Insect Bites
Emergency Conditions
For Bites
Signs & Symptoms
Swelling. Redness. Pain. Itching.
Bleeding.
Tissue loss, if the wound is severe.
Skin rash. With Lyme disease, a red bull's eye rash with a white center around the bite occurs. Fatigue, fever, and joint pain may also occur.
Lockjaw. This is a painful, persistent stiffness of the jaw due to a toxin. Tetanus shots can prevent this.
Allergic reaction, such as with insect bites.
Causes
Dog, cat, and human bites are the most common animal bites in the U.S.
Black widow and brown recluse spider bites can cause severe reactions.
Deer tick bites can cause Lyme disease, a bacterial infection.
Less common, but more dangerous, are bites from skunks, raccoons, bats, and other animals that live in the wild. These animals can have rabies. This is a serious viral infection. It can be fatal. Most house pets are vaccinated for rabies. It's unlikely they carry the virus.
Mosquito bites can cause West Nile virus if the mosquito is infected with it.
Snake bites can be fatal if the bite is from a poisonous snake (e.g., rattlesnakes, cotton mouths, copperheads, and coral snakes).
Shark bites are a potential problem when swimming in shark-infested waters.
Treatment
Self-care can be used for dog and cat bites that cause scratches on the skin and for insect bites that do not cause a severe allergic reaction. 
All human bites that break the skin should be checked by a doctor due to the high risk for infection.
A series of rabies shots can prevent the spread of rabies to humans. The shots should begin soon after a bite from an infected animal. Antivenom can be given for poisonous snake bites at emergency medical facilities. It should be given within 4 hours of the bite.
For Stings
Signs & Symptoms
Quick, sharp pain.
Swelling, itching, and redness at the sting site. These can occur beyond the sting site.
Raised bump (with or without pus).
Treatment
Self-care treats mild reactions to stings.
A severe allergic reaction needs immediate care. Symptoms of a severe allergic reaction usually happen soon after or within an hour of the sting.
Persons with a severe allergic reaction to a sting in the past should carry an emergency kit, prescribed by a doctor. A medical alert tag should be worn to let others know of the allergy. Persons who have had severe reactions to bee or wasp stings should ask their doctors about allergy shots.
Self-Care / First Aid
For Poisonous Snake Bites Before Medical Care
Carefully move the person away from the snake. Calm the person. Have him or her rest. Moving about can help spread the venom.
Gently wash the bite area with soap and water. Keep the limb of the bite site level with the heart (or just below this). Apply a splint to the limb of the bite site to keep it from moving.
Being careful, note, if you can, the shape of the snakes eyes, pupils, and head, the colors it is, and if it has rattles.
Don't try to kill the snake, cut the fang mark, or suck out the venom.
Don't apply a tourniquet, a bandage, or ice to the bite.
For Non-Poisonous Snake Bites
Gently wash the site with soap and water.
Treat the bite as a minor wound.
If you notice signs of an infection, call your doctor.
For Poisonous Spider Bites Until Emergency Care Arrives
Perform rescue breathing, if needed.
If you can, keep the bitten area lower than the level of the heart.
Calm the person and keep him or her warm.
Gently clean the site of the bite with soap and water or rubbing alcohol.
Put an ice pack over the bite site for pain relief.
If you can, catch the spider in a closed container to show what kind it is.
For Poisonous Spider and Scorpion Bites Before Medical Care
Do rescue breathing, if needed.
If you can, keep the bitten area lower than the level of the heart.
Calm the victim and keep him or her warm.
Gently clean the site of the bite with soap and water or rubbing alcohol.
Put an ice pack over the bite site to relieve pain.
If you can, catch the spider in a closed container to show the doctor.
Get emergency care!
For Human Bites Before Medical Care
Wash the wound area with soap and water for at least 5 minutes. Don't scrub hard. Rinse with running water or with an antiseptic solution, such as Betadine.
Cover the wound area with sterile gauze. Tape only the ends of the gauze in place. Then get medical care.
For Deer Tick Bites
Remove any ticks found on the skin. Use tweezers to grasp the tick(s) as close to the skin as you can. Firmly, but gently begin rotating the head part in a counterclockwise manner until the whole headpiece comes out. Or, pull gently and carefully in a steady upward motion at the point where the tick's mouthpart enters the skin. Try not to crush the tick. The secretions released may spread disease.
After you remove the ticks, wash the wound area and your hands with soap and water. Apply rubbing alcohol to help disinfect the area.
Use an ice pack over the bite area to relieve pain.
Save one tick in a closed jar with rubbing alcohol to show the doctor.
For Dog and Cat Bites
Wash the bite area right away with soap and warm water for 5 minutes. If the bite is deep, flush the wound with water for 10 minutes. Dry the wound with a clean towel. Then get medical care.
If the wound is swollen, apply ice wrapped in a towel for 10 minutes.
Get a tetanus shot, if needed.
If the bite hurts, take an over-the-counter (OTC) medicine for pain.
Report the incident to the animal control department. If a pet's immunizations are not current, arrange with the animal control department for the pet to be observed for the next 10 days to check for rabies.
Observe the wound for a few days. Look for signs of infection. Often, cat bite wounds need an antibiotic.
For a Stingray Bite
Remove the person from the water.
Apply a local pressure bandage for a wound that bleeds a lot.
Immerse the wound area in hot water for 30 to 90 minutes. Make sure the water is not hot enough to burn the skin.
Scrub the wound area well with soap and water.
Unless the wound is a slight one in only one limb, get medical help right away.
For Stings from Jellyfish or Sea Nettles, etc.
Remove the person from the water. Don't touch the sting area with bare hands.
Rinse the sting area with salt (not fresh) water right away. Don't put ice on the skin. If you can, put vinegar or rubbing alcohol on the area several times for 30 or more minutes until the pain is relieved.
Apply dry or moist heat to the sting area until the pain subsides. You can mix one part ammonia with 3 parts salt water and apply this to the sting area.
Wear gloves when you remove stingers. Use a towel to wipe the stingers or the tentacles off. Use tweezers to lift large tentacles. Don't scrape or rub them.
To relieve itching, apply OTC calamine lotion or 1% hydrocortisone cream to the affected area as directed on the label.
Contact your doctor for any signs of infection.
