Comprehensive Guide to Sand Bug Bites: Identification, Treatment, Prevention

How Long Do Sand Flea Bites Last? What To Know

Chigoe fleas. Beach hoppers. Sand fleas. These are just some of the names commonly used for sand bugs. But whatever name you use, one thing remains the same – their bites can be extremely concerning for your health. That’s why knowing all the relevant information about what these bugs are and what their bites look like is crucial.

Though sand bugs are not common in the U.S., travelers and outdoor enthusiasts should always be on the lookout for these pesky creatures. So, without further ado, let’s delve into the essential details: recognizing sand bug bites, understanding the potential health risks associated with them, and adopting precautionary measures to ensure a safe and enjoyable experience for you and your family.

Identification of Sand Bugs

There are many misconceptions about sand fleas, their characteristics, and their behavior. So, let’s start by covering the basics.

What Are Sand Bugs?

As mentioned before, sand bugs go by many different names. Sometimes, these names refer to entirely different species.

The species people most commonly have in mind when using the words “sand bugs” is sand fleas. Interestingly, these animals are no fleas. In fact, they aren’t even insects. They’re small crustaceans usually found on beaches, along coastal areas, and in sandy marshes.

Other common sand bugs include sand flies and chigoe fleas. While both of these bugs are insects, they couldn’t be more different in terms of their effect on human health.

In one corner, there are sand flies, which are generally harmless. In the other, there are chigoe fleas (Tunga penetrans), which can wreak havoc on human health. The adult females of these parasitic insects burrow themselves into the human skin, looking for a blood meal. Even after exiting the skin, they can leave the host with numerous secondary infections, such as gangrene and tetanus. These insects can be found in tropical and subtropical areas around the world, such as Mexico and South America.

For the purpose of this article, we’ll primarily focus on the first type of sand bugs (i.e., sand fleas), but we’ll also mention other species when necessary.

Characteristics of Sand Bugs

Since sand fleas have nothing to do with “regular” fleas, it shouldn’t be surprising that they also don’t look anything alike. Sand fleas are in the same family as lobsters and crabs, so they resemble a miniature (or rather microscopic) version of these crustaceans. People only refer to them as “fleas” because they can hop and jump up to 15 inches (hence, the beach or sand hoppers monikers).

Unlike numerous similar creatures, sand fleas don’t bite humans as a form of self-defense. Instead, they do it to feed themselves. You see, sand fleas use human blood as fuel. Without it, these blood feeders wouldn’t be able to lay their eggs.

Sand fleas tend to be the most active around dawn and dusk. If these are your favorite times to visit the beach, be on guard.

Recognizing Sand Bug Bites

Now that you know what sand fleas are and what they look like, let’s move on to their bites. Unlike everything else related to these animals, sand bug bites do resemble common flea bites. This means that they typically present as small, reddish, raised bumps, typically below the knees.

If you’re intrigued about the location, remember that these animals aren’t insects and can’t fly. So, they can only bite you as high as they can jump, which typically means you can expect sand bug bites on your feet, ankles, shins, and calves. The same goes for chigoe fleas.

However, a beach day can involve lots of sunbathing on the sand, so technically, sand bug bites can appear higher up, on your thighs, groin, or hands.

But how do these bites affect you, and how can you differentiate them from other common, itchy bites? Keep reading, and you’ll get answers to these questions.

Symptoms of Sand Bug Bites

A typical sand flea bite initially causes mild symptoms. These include itchy and irritated skin and a slight inflammation. This bite can also cause swelling, which can go up or down in the days following the bite. This is perfectly normal. However, if the swelling keeps going up (or the redness doesn’t cease), you might require professional medical care.

Though the bite of a female Tunga penetrans starts off similarly, it typically progresses much worse. These bites can turn into black spots and even cause open skin lesions, which are highly susceptible to bacterial infections.

Comparison with Other Insect Bites

Here’s a quick overview of how common sand flea bites compare to other bites you might encounter often.

  • Mosquito bite. Mosquito bites typically occur in isolation as reddish bumps with a puncture wound in the middle. These bites can be efficiently treated with mosquito patches for adults and mosquito patches for kids.
  • Flea bite. Flea bites look almost the same as sand flea bites, but they tend to have much milder symptoms associated with them.
  • Sandfly bite. Most sandfly bites resemble mosquito bites. While generally harmless, sandflies can carry a Leishmania parasite, which can cause skin wounds and large persistent ulcers. These parasites can cause potentially life-threatening illnesses, including Cutaneous leishmaniasis, mucosal leishmaniasis, and visceral leishmaniasis.

Health Risks Associated with Sand Bug Bites

Most sand bug bites won’t cause any long-lasting harm. At most, they’ll cause skin irritation, itching, or inflammation, which can pass on its own or be resolved with some over-the-counter (OTC) treatment. But unfortunately, this doesn’t apply to all sand bug bites.

Potential Complications

For some individuals, sand bug bites can cause allergic reactions, resulting in an itchy skin rash, intense swelling, or hives. Scratching these bites can also break the skin, opening the doors to a host of secondary bacterial infections. This unfortunate scenario can be avoided by applying an itch patch to the affected area.

Given everything you’ve learned about chigoe fleas so far, you probably won’t be surprised that these types of sand fleas can cause much greater complications. The burrowing of the female flea into the skin puts you at the risk of tungiasis (sand flea disease), which can result in numerous complications, such as the loss of nails and difficulty walking, as well as some long-term health concerns like chronic pain.

Immediate Response to Sand Bug Bites

By now, one thing’s abundantly clear – sand bug bites are not to be ignored. Of course, this doesn’t mean you should spend every beach day frantically swatting away any bug that might come your way. It just means you should be vigilant and ready for action if a bite does occur.

First Aid and Home Remedies

Here are the dos and don’ts of treating sand bug bites at home:

  • Do: Gently clean the bite with soap and warm water.
  • Do: Use home remedies for relief (e.g., aloe vera)
  • Do: Apply cold packs to reduce the swelling.
  • Do: Apply bug bite patches to protect the affected area.
  • Do: Seek medical attention if your symptoms are worsening.
  • Don’t: Scratch the bite or pick at it.
  • Don't: Cut into a chigoe flea bite to remove the parasite.

Over-the-Counter Treatments

If home remedies don’t help, you can always switch to over-the-counter treatments, like the following:

  • Anti-itch creams (e.g., calamine lotion)
  • Antihistamines (topical or oral) for allergic reactions
  • Corticosteroids (topical or oral) to reduce inflammation or swelling

Medical Treatment and When to Seek Help

For most sand bug bites, at-home treatments, OTC medicines, and some time are all you need. However, there are some cases when you might require medical attention. Learn how to recognize these cases and what the attention in question might entail.

Signs That Require Medical Attention

After a sand bug bite, you must keep a watchful eye on the bite, your general health, and your family members. If any of these scenarios take place, seek immediate medical attention:

  • The bite drastically changes in size and appearance over time.
  • A family member exhibits signs of infection.
  • You have difficulty breathing (this could indicate a severe reaction like anaphylaxis).
  • You’re in pain or have trouble walking.

Professional Medical Treatments

Depending on the severity of your symptoms (and the type of sand bug bite), your doctor might recommend the following actions:

  • A sterile surgical removal of the sand fleas
  • Tetanus vaccination
  • Antibiotics for people with open wounds
  • Topical medications like dimethicone

Prevention Strategies

Technically speaking, sand bug bites aren’t preventable. After all, these tiny creatures are almost impossible to spot and can be present in various outdoor environments. However, stick to these prevention measures, and you’ll significantly reduce the likelihood of getting bitten by a sand bug.

Personal Protective Measures

Here’s what to do to protect yourself (and your family members) from sand bugs as much as possible:

  • Wear appropriate shoes. Since most sand fleas can only reach your legs, wearing closed-toes shoes will help you protect yourself against them.
  • Use repellents. Repellents like bug sprays can do wonders for keeping common sand fleas away. Just make sure to apply them properly.
  • Do proper research. If you’re planning to visit a tropical area, it doesn’t hurt to check which beaches are known for sand bug issues. This way, you can avoid them altogether or take precautions to protect your family.
  • Be mindful of when you visit bug-prone areas. Visiting the beach around dawn or dusk increases your chances of getting bit by a sand bug. The same goes for visiting the beach right after it has rained, as wet conditions heighten sand flea activity.
  • Keep moving. Don’t give the sand bugs a chance to bite you by avoiding sitting or lying on the sand for prolonged periods.

Environmental Controls

There are some measures you can take to reduce the presence of sand bugs in outdoor areas.

  • Eliminate standing water since sand bugs thrive in wet conditions
  • Regularly rake sand areas to disrupt the bugs’ habitats
  • Use insecticides when appropriate
  • Hire a professional pest control service

Myths vs. Facts

Sand bugs (and sand fleas, in particular) aren’t exactly the most well-known creatures. So, it shouldn’t be surprising numerous myths surround them and their bites. Let’s debunk these myths and provide a clearer (and 100% accurate) understanding of these bugs.

Myth #1: Sand Bugs Are Always Harmful

This couldn’t be further from the truth, as there are numerous harmless sand bugs that scavenge for decomposing organic matter. They also serve as food to shorebirds and fish, adding to their ecological importance.

Myth #2: Sand Fleas Are Insects

Despite what their name might suggest, sand fleas aren’t insects. They are crustaceans, specifically small amphipod crustaceans.

Myth #3: All Itchy Bites on the Beach Are From Sand Bugs

Beaches aren’t exclusively populated by sand bugs. There are plenty of other insects that can cause itchy bites in these environments, including mosquitos. However, these bites can also be avoided more successfully by using powerful mosquito stickers.

Myth #4: Sand Bugs Are Present on Every Beach

Most sand bugs are native to tropical and subtropical areas. And even in these areas, not every beach must be overflowing with sand bugs. It all depends on the exact environmental conditions.

Myth #5: All Sand Bug Bites Are Severe

The truth is that most sand bug bites will result in mild symptoms that can pass with proper care or even on their own. Only some bites will lead to complications. This can happen if you’re highly sensitive, prone to allergies, fail to take care of the affected area, or simply get bit by more dangerous bug species (e.g., Tunga penetrans fleas or sandflies carrying Leishmania parasites).

A Trip to the Beach Without the Itch

While there are a lot of creatures that can go by the name “sand bug,” most of them don’t pose much of a threat. By keeping an eye on the bite, sanitizing it, and treating it delicately, its symptoms will hopefully be gone in the blink of an eye.


What to do for sand bug bites?

If you get bit by a sand bug, gently clean the bite with soap and warm water. Then, use home remedies like aloe vera or over-the-counter treatments like anti-itch creams to heal the affected area and reduce discomfort.

What can bite me in the sand?

Various types of sand bugs can bite you in the sand, including common sand fleas, sandflies, sea lice, and chigoe fleas.

How do you identify a sandfly bite?

Sandfly bites typically start off similarly to mosquito bites but quickly grow larger and appear ulcerated or nodular.

How long do sand bites last?

Common sand bites typically last up to a week.

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