Engorged Ticks: How to Identify, Remove, & Prevent Them

If you think you’ve spotted an engorged tick, you may wonder what to do next. An engorged tick is one that’s fed for a few days and may possibly transmit disease. We spoke with animal and outdoor experts to find out more about how to deal with ticks. In this guide, we share important information about identifying an engorged tick, removing a tick, prevention tips, and more.

Engorged Tick Identification Chart

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An illustration of a female adult tick as it becomes engorged during feeding.

An adult engorged tick is round, plump, and about the size of a bean. Generally they can measure about ¹⁄₂ inch (1.3 cm) long after feeding. Their color also lightens to gray or pale tan. An engorged tick has been feeding for a few days and could transmit diseases, like Lyme disease, depending on the tick species.

Section 1 of 6:

Identifying an Engorged Tick

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An engorged adult tick is round, plump, and lighter in color. While there are many species of ticks, generally an unfed tick is flat, oval, and dark red or brown. Their color lightens when their body expands due to feeding and can turn light gray or white. An unfed adult tick measures about ¹⁄₈ inch (0.32 cm) long, whereas an engorged female tick can be up to ¹⁄₂ inch (1.3 cm) long. Male ticks do not become enlarged when feeding.^{[1]
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- Unfed nymph ticks are tiny, about the size of a poppy seed, and around 1 to 2 millimetres (0.039 to 0.079 in) long. Nymphs that have fed plump up and can grow to 3 to 4 millimetres (0.12 to 0.16 in) long.^{[2]
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- Due to the very small size of nymph ticks, they’re often invisible on the skin and most people don’t see them.
- For general identification tips, see our guide on how to identify a tick.
Meet the wikiHow Experts

Josh Goldbach is an outdoor education expert who specializes in outdoor adventure tips and is a trained wilderness first responder.

Natalie Punt, DVM, is a veterinarian whose expertise includes small animal emergencies and general medicine.

Section 2 of 6:

Deer Ticks & Lyme Disease

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Deer ticks are known for transmitting Lyme disease. Also called blacklegged ticks, they’re a reddish-brown color with a black shield on their back. Adults are about the size of a sesame seed, measuring around ¹⁄₈ inch (0.32 cm) when unfed and up to ¹⁄₂ inch (1.3 cm) after feeding. They feed using a narrow mouthpart. They can be found throughout the United States but are most prevalent in the Northeast, Upper Midwest, and the Great Lakes region.^{[3]
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- Deer ticks are most active during spring and summer, but they also feed any time temperatures are above 32 °F (0 °C).
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Deer ticks can transmit Lyme disease within 24 to 48 hours of attachment. If the tick is a carrier of disease, they can spread it to their human or animal host. The infected tick usually has to be attached for a certain amount of time in order for the host to contract an illness. Deer ticks usually feed for 3-5 days, which is plenty of time for Lyme disease to be transmitted within that 24-48 hour window, if they’re not removed right away.^{[4]
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- It’s estimated that 1 in 3 adult blacklegged ticks and 1 in 5 nymph blacklegged ticks can cause Lyme disease.
- Most Lyme disease is transmitted by deer tick nymphs because their very tiny size makes them hard to spot and remove right away.
- Disease transmission doesn’t occur if you’re bitten by a tick that’s not infected.

Section 3 of 6:

Other Common Types of Ticks

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American dog ticks are large and have red and brown dotted bodies. They’re the biggest tick species. Adults measure up to ¹⁄₄ inch (0.64 cm) long unfed and ¹⁄₂ to ⁵⁄₈ inch (1.3 to 1.6 cm) long after feeding. They’re known for transmitting Rocky Mountain spotted fever and Tularemia to hosts. While they usually feed on animals, they have been known to bite humans.^{[5]
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- Peak months for adult American dog ticks are between April and July.
- American dog ticks mostly inhabit the East Coast and the Rocky Mountains. On the West Coast, they’re usually found in California.
- Transmission time for Rocky Mountain spotted fever is 18-24 hours, while it’s 3-5 days for Tularemia.
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Lone star ticks have a visible white dot on the dorsal shield. This is found on female adult ticks. They’re also round, reddish-brown in color, and have prominent festoons. An adult lone star tick is around ¹⁄₄ inch (0.64 cm) long unfed and up to ¹⁄₂ inch (1.3 cm) long when engorged. They’re known to transmit Human Monocytic Ehrlichiosis, Tularemia, and Southern Tick Associated Rash Illness (STARI). While they carry the bacteria that causes Lyme disease, they’re not able to spread it to their host.^{[6]
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- Lone star ticks are most active between April and September.
- They can be found throughout the southern United States, the eastern coast, and in Texas and Iowa.
- Transmission time is 18-24 hours for Ehrlichiosis, 3-5 days for Tularemia, and unknown for STARI.

Section 4 of 6:

Checking for Engorged Ticks

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Carefully examine your clothing for ticks before going into your home, including your top, pants, socks, shoes, and outerwear. After undressing, put dry clothes in the dryer for 10-15 minutes on high heat, in case you missed a tick. Wet clothing should be placed in the dryer for 90 minutes on low heat or 60 minutes on high heat.^{[7]
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Closely examine the crevices of your body. Ticks like to nestle in areas where they can hide, so you need to do more than just glance at the surface of your skin. Check behind your ears, between fingers and toes, behind your knees, in your belly button, in your hair, and around the ankles and groin.^{[8]
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- Do another check when you’re in the shower. This is a great time to wash ticks off of your body if you spot one before they fully attach themselves.
When you bring your dog or cat back inside from being outdoors, run your fingers through their coat and feel for any bumps or raised areas. If you feel a bump, take a closer look to see if it’s a tick. Look between your pet’s toes, under their armpits, inside their ears, and around their chin and face.^{[9]
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Section 5 of 6:

Removing an Engorged Tick

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Wear gloves and use a pair of tweezers to remove an engorged tick. Put on gloves to protect yourself from any tick-borne illnesses. Outdoor education expert Josh Goldbach recommends using tweezers that have a really precise point. He says to get as close to the skin as possible and “pinch the head to make sure that there's no possibility of leaving any of the parts of the tick behind.”^{[10]
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Josh Goldbach
Outdoor Education Expert

Expert Interview} Make sure to pull upwards so the tick doesn’t break apart.^{[11]
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- Veterinarian Natalie Punt, DVM, suggests the same approach when removing a tick from your dog. She says to make sure you get a good grasp on the head so it doesn’t stay stuck on your pet.^{[12]
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- When trying to remove a tick, don’t use petroleum jelly, heat, nail polish, or other substances as these can agitate the tick.^{[13]
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- See our guide for tips on removing ticks in your hair.
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Place the tick in a container with isopropyl alcohol. After you remove the tick, fill a small container with isopropyl alcohol and put the tick in it. This kills the tick if it’s still alive. Secure the container tightly, and toss it in the trash. Alternatively, you can flush the tick down the toilet.^{[14]
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Centers for Disease Control and Prevention
Main public health institute for the US, run by the Dept. of Health and Human Services

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- Dr. Punt explains that you can take the container to your vet so they can identify the tick and narrow down possible tick-borne diseases to watch out for.^{[15]
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- Do not crush a tick between your fingers as this can spread harmful diseases to you if the tick is infected.
- If you want to preserve and submit the tick to a lab for testing, don’t place it in alcohol to avoid interfering with DNA and RNA testing.^{[16]
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Whether you removed a tick from yourself or your pet, there will likely be a small, red bump where the tick was. Thoroughly wash your hands with soap and water, and apply rubbing alcohol to the skin to kill any bacteria or germs.^{[17]
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If you’re unable to remove the tick, see a doctor right away so the parasite doesn’t remain on your skin long enough to transmit disease. Other reasons to see a professional are if the bump where the tick was gets bigger or looks infected or if you experience flu-like symptoms.^{[18]
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Section 6 of 6:

Preventing Tick Bites

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Dress in long pants and long-sleeved tops. Goldbach explains that one of the best ways to prevent tick bites when you’re outdoors is by covering up and wearing long pants and a shirt with long sleeves. He also says to check for ticks right after hiking or doing recreational activities so you can catch any before they embed in the skin.^{[19]
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Josh Goldbach
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- Wear shoes instead of sandals to avoid exposing your feet, and tuck pants into your socks for optimal coverage.^{[20]
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Avoid tall grass and low bushes that may have ticks. If possible, keep you and your dog away from areas where there’s a lot of leaf litter or vegetation. Ticks are drawn to these types of spots because they’re perfect places for them to hide. Instead, stay on clear trails. ^{[21]
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- For more advice, see our guide on how to prevent ticks on dogs.
Insect repellants that contain at least 20% DEET or Picaridin can keep ticks and other pests off of you. An insect repellant with 20% DEET provides about 4 to 8 hours of protection. Sweat, humidity, and water exposure can affect how long protection lasts, so you may need to reapply every few hours.^{[22]
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Ticks are drawn to shady areas, like leaf piles, brush, and tall grass. You can prevent them from inhabiting your yard by mowing your grass regularly, clearing brush and weeds, trimming bushes and trees, and reducing vegetation.^{[23]
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Common Questions: Engorged Tick Identification

What does an engorged deer tick look like vs a dog tick?

An engorged adult deer tick goes from brown and orange to green-silver and is the size of a sesame seed, measuring about ¹⁄₈ inch (0.32 cm) long. An adult American dog tick is reddish-brown but turns gray or dark red when engorged. It measures about ¹⁄₂ to ⁵⁄₈ inch (1.3 to 1.6 cm) long when it’s engorged.^{[24]
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What are the signs of Lyme disease after finding an engorged tick?

Early signs of Lyme disease appear within 3 to 30 days and can include fever, chills, fatigue, Erythema migrans rash, and muscle aches. Later symptoms can take days or months to appear after a tick bite and can include severe headaches, more Erythema migrans rashes, severe joint pain, and dizziness episodes.^{[25]
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Centers for Disease Control and Prevention
Main public health institute for the US, run by the Dept. of Health and Human Services

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How do you preserve an engorged tick for lab testing?

After you’ve removed the tick, place it in a secure container, vial, or plastic bag. Do not preserve ticks in alcohol, formalin, or saline or tape them. Put the primary container you used into a plastic bag. If you have multiple ticks, place each one in a separate container.^{[26]
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Store the specimen in the fridge until you’re ready to ship it. Put the container in bubble wrap, and place it in a box to mail it out.^{[27]
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Follow any special instructions given by the lab that you’re submitting your specimen to.