Understanding Lone Star Tick Diseases: A Comprehensive Guide to Symptoms and Prevention

Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026

Lone star tick diseases are illnesses you can get from the bite of a lone star tick, a small tick found in and around wooded areas in the Midwestern and Eastern U.S. They range from a delayed red meat allergy (alpha-gal syndrome) to bacterial and viral infections, and many can be severe if not treated right away [1].

Quick Answer: What are lone star tick diseases?

Lone star tick diseases are illnesses spread by the lone star tick, including alpha-gal syndrome, ehrlichiosis, STARI and tularemia. Symptoms usually start a few days to two weeks after a bite and may include fever, chills, headache and rash. Bacterial infections are treated with antibiotics. See a provider right away for symptoms after a tick bite. [1]

What the research says

• Alpha-gal sensitization is common in parts of the U.S. In a CDC-led study, 3,000 blood donor samples from 10 states were tested for alpha-gal IgE antibodies, and the highest estimated seroprevalence among people aged 16 and older was in Arkansas (31.2%) and Missouri (26.0%); high-prevalence states matched those with many suspected cases, the syndrome was estimated to affect up to 450,000 people in the U.S. as of 2022, and antibodies can be present without symptoms (Saunders et al., MMWR, 2026 [2]).

• Alpha-gal reactions are delayed and can vary. A review reports that reactions typically occur 2 to 8 hours after exposure to mammalian foods or other alpha-gal products, range from hives to anaphylaxis, and can differ from one exposure to the next in the same person; an estimated 15,000 new cases occur each year in the U.S. (Pace et al., Front Allergy, 2026 [3]).

• Tick-borne viruses are easy to miss. Reviews note that Heartland and Bourbon viruses are likely transmitted by the lone star tick and should be considered in people with a tick-borne illness that does not improve with doxycycline (Higuita et al., Infez Med, 2021 [4]), that Heartland virus infection is probably underreported, and that patients who deteriorate to sepsis early have a very poor prognosis despite aggressive supportive care (Dembek et al., Microorganisms, 2024 [5]).

What Are Lone Star Tick Diseases?

Lone star tick diseases are illnesses you can get through the bite of a lone star tick (Amblyomma americanum). Ticks can be as small as a poppy seed, and adult females have a white dot on their back, the “lone star.” They live in and around wooded areas in the Midwestern and Eastern parts of the U.S. [1].

Unlike a mosquito, a tick latches on and burrows its head into your skin, feeding for a day or longer, and it can transmit disease during that time. Bacteria and viruses cause lone star tick diseases, and experts do not know what causes STARI [1].

An adult female lone star tick has a white dot on her back.

The Main Lone Star Tick Diseases

Disease	Cause	Key points
Alpha-gal syndrome	Allergic reaction	Often called “red meat allergy.” It can cause anaphylaxis after eating red meat or products that contain animal proteins, and it has no cure.
Ehrlichiosis	Bacteria	A bacterial infection that can be severe if not treated right away. It is treated with antibiotics.
Tularemia	Bacteria	A bacterial illness that can cause skin ulcers and swollen lymph nodes. It is treated with antibiotics.
Heartland virus disease	Virus	A viral disease with no specific treatment; care focuses on supporting your body while you recover.
Bourbon virus disease	Virus	A viral disease with no specific treatment; care focuses on supporting your body while you recover.
STARI	Unknown	Southern tick-associated rash illness, with symptoms similar to Lyme disease.

What are the symptoms of lone star tick diseases?

Lone star tick disease symptoms depend on the illness and can take a few days to two weeks to develop after a bite. Some symptoms could include [1]:

• Whole-body symptoms: fever, chills, headache, muscle pain or soreness, and tiredness.

• Skin symptoms: a rash or hives, or an open wound (ulcer or lesion) on your skin.

• Lymph nodes: painful, swollen lymph nodes.

• Digestive symptoms: nausea, vomiting, stomach pain, diarrhea, and loss of appetite.

• Eye symptoms: pain, watering, sensitivity to light, or corneal ulceration.

A lone star tick bite can also irritate your skin without causing other symptoms. The area around the bite might itch, swell, turn red, or look lighter or darker than the skin around it. This does not necessarily mean the tick infected you with a germ [1].

Common symptoms may include fever, headache, muscle pain, and a rash at the bite site.

What complications and risks come with lone star tick diseases?

If they are not treated quickly enough, some lone star tick diseases can lead to serious or life-threatening complications. Alpha-gal syndrome can cause anaphylaxis, a severe allergic reaction, when you eat red meat or products that contain animal proteins [1].

System affected	Potential complication
Blood and clotting	Disseminated intravascular coagulation (DIC) and internal bleeding (hemorrhage).
Respiratory	Acute respiratory distress syndrome (ARDS) or respiratory failure.
Kidneys	Acute kidney injury (renal failure).
Brain and nerves	Brain inflammation (meningoencephalitis), seizures, or coma.
Circulation and heart	Sepsis or heart failure.

How are lone star tick diseases diagnosed and treated?

A healthcare provider will give you a physical exam and ask about your symptoms and health history. It is important for them to know if you have recently (within the past three weeks) been in an area where you could have been bitten by a tick, even if you do not remember being bitten. They may also order blood tests or a bacterial culture to look for signs of infection, and if they think you have a bacterial illness, they may start treating you right away before the results come back [1].

Treatment Approaches

There is no single cure for lone star tick diseases because they have different causes. Treatment depends on the illness [1]:

1. Bacterial infections: antibiotics treat diseases such as ehrlichiosis and tularemia.

2. Viral infections: there is no specific treatment. Rest, fluids, and over-the-counter medications (if your provider recommends them) can help your symptoms while you recover.

3. Severe cases: you may need treatment in the hospital with IV (intravenous) fluids, IV antibiotics, or pain medications.

4. Alpha-gal syndrome: there is no cure, so you need to avoid the foods and medications you are allergic to.

When to Get Emergency Care

If you have been bitten by a tick or have been in an area with ticks and have symptoms, see a healthcare provider right away. Go to the nearest emergency room if you experience [1]:

• A fever over 103 degrees Fahrenheit (39.4 degrees Celsius).

• Coughing up blood.

• Difficulty breathing.

• Confusion or other mental changes.

• Severe stomach (abdominal) pain.

• Seizures.

• Swelling of your face, mouth, tongue, or throat.

How can you prevent lone star tick diseases?

Avoiding tick bites is the best way to reduce your risk of lone star tick diseases. Strategies include [1]:

• Keep grass cut shorter than 5 inches.

• Stay on cleared paths while in wooded areas.

• Use bug sprays with DEET or other ingredients approved to keep ticks away.

• Cover as much of your skin as possible with clothing when you are in the woods or areas with long grass.

• Check yourself for ticks after you have been outside, and if possible, have someone check places you cannot see, such as your back and scalp.

• Ask your veterinarian about the best way to protect your pets from ticks, and check your pets often, especially after they have been outside.

Cover your skin, use repellent, and check for ticks after being outdoors.

If You Find a Tick on Your Skin

Do not panic. Clean the area with rubbing alcohol and a cotton ball. Then use tweezers to carefully remove the tick by its head as close to the skin as possible, without squeezing the tick’s body, and make sure the head and mouth parts are not left stuck in your skin. Note whether the tick looks flat or rounded, because this can help your provider estimate how long it was attached and your risk of a tick-borne illness [1].

What is the outlook for lone star tick diseases?

You can fully recover from most lone star tick diseases if they are diagnosed and treated right away, although it might take several weeks to feel completely better. Alpha-gal syndrome has no cure, so you will need to avoid the foods and medications you are allergic to [1].

What is the bottom line on lone star tick diseases?

Bug bites are usually just annoying, but ticks can spread serious illnesses. Most people make a full recovery with quick treatment, and knowing the symptoms and how to prevent bites are your best protection [1].

Your next step: if you spend time in areas with ticks, learn how to prevent bites and remove ticks safely. If you are bitten, talk to a provider about which symptoms to watch for and when to seek treatment [1].

Frequently Asked Questions

How long does it take for symptoms to appear?

Symptoms can take anywhere from a few days to two weeks to develop after a tick bite.

Is there a cure for alpha-gal syndrome?

No. Alpha-gal syndrome has no cure, so you need to avoid the foods and medications you are allergic to.

What should I do if I find a tick on my skin?

Clean the area with rubbing alcohol, then use tweezers to remove the tick by its head as close to the skin as possible, without squeezing its body.

Can pets get lone star tick diseases?

Ticks can bite pets too. Ask your veterinarian about the best way to protect your pets, and check them often for ticks, especially after they have been outside.

When is a fever considered an emergency?

A fever over 103 degrees Fahrenheit (39.4 degrees Celsius) is a reason to go to the nearest emergency room.

Are all lone star tick bites infectious?

No. A bite can irritate your skin without meaning the tick infected you with a germ.

What is the “lone star” on the tick?

The “lone star” on the tick is the white dot on the back of an adult female lone star tick.

Can viral tick diseases be treated with antibiotics?

No. Antibiotics treat bacterial infections. Viral diseases such as Heartland and Bourbon virus disease have no specific treatment, and care focuses on supporting your body while you recover.

What is STARI?

Southern tick-associated rash illness (STARI) is a lone star tick-linked illness with symptoms similar to Lyme disease. Experts do not know what causes it.

How can I reduce ticks around my home and outdoor areas?

Keep grass cut shorter than 5 inches, stay on cleared paths in wooded areas, and ask your veterinarian how to protect your pets.

References

1. Cleveland Clinic. Lone Star Tick Diseases. Cleveland Clinic. March 28, 2025. https://my.clevelandclinic.org/health/diseases/lone-star-tick-diseases

2. Saunders EF, Taylor ML, Jones ES, et al. Alpha-gal immunoglobulin E seroprevalence among blood donors – 10 states, 2024–2025. MMWR Morb Mortal Wkly Rep. 2026;75(25):315-321. PMID 42391055. https://doi.org/10.15585/mmwr.mm7525a1

3. Pace A, Norman-Burgdolf H, Cason A. Nutritional considerations for alpha-gal syndrome: a mini-review. Front Allergy. 2026;7:1904888. PMID 42676563. https://doi.org/10.3389/falgy.2026.1904888

4. Higuita NIA, Franco-Paredes C, Henao-Martínez AF. The expanding spectrum of disease caused by the Lone Star Tick, Amblyomma americanum. Infez Med. 2021;29(3):378-385. PMID 35146342. https://doi.org/10.53854/liim-2903-8

5. Dembek ZF, Mothershead JL, Cirimotich CM, et al. Heartland virus disease: an underreported emerging infection. Microorganisms. 2024;12(2):286. PMID 38399689. https://doi.org/10.3390/microorganisms12020286

Medical disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. The clinical information in this guide reflects source material last reviewed in March 2025.