False widow spiders are often confused with the more dangerous black widows, but they are not the same. These spiders are found in homes and gardens in many parts of the world, especially in the UK and parts of Europe. While their bites are usually not life-threatening, they can still cause pain, swelling, and discomfort. Knowing the symptoms and what to do can help you stay calm and safe.
What Is a False Widow Spider?
False widow spiders belong to the Steatoda genus, with Steatoda nobilis (noble false widow) being the most well-known species. They have a glossy body with a brownish color and cream markings, sometimes resembling a skull shape. Their legs are often orange-brown and long.
These spiders prefer quiet, dark places such as attics, sheds, and behind furniture. They are not aggressive and usually bite only when disturbed or threatened. Even though their venom can cause mild to moderate symptoms, false widow bites are far less dangerous than black widow bites.
7 Symptoms of a False Widow Spider Bite
A false widow spider bite can cause a range of symptoms, from mild discomfort to more serious reactions. Most bites happen when the spider is accidentally pressed against the skin, such as when putting on clothes or shoes. Here are seven common symptoms people may experience after being bitten by a false widow spider.
1. Localized Pain
The bite often causes pain at the site. It can feel like a bee sting or a sharp pinch. The pain may begin within minutes and can last several hours. In some cases, it spreads slightly to nearby areas.
2. Redness and Swelling
Redness and slight swelling usually appear around the bite mark. The skin may look inflamed, and the swelling may increase over a few hours. This is a common reaction as the body responds to the venom.
3. Itching or Tingling
Some people feel itching or a tingling sensation around the bite. This might happen right after the bite or a few hours later. It can become irritating but usually fades with time.
4. Blister Formation
In certain cases, a small blister may form at the bite site. It can fill with clear fluid and later crust over. If the blister is scratched or opens, it may increase the risk of infection.
5. Muscle Stiffness or Fatigue
Mild muscle stiffness, especially around the bitten limb, can occur. Some people report feeling tired or slightly weak, though this is more common in sensitive individuals.
6. Nausea or Headache
Though rare, some individuals experience general symptoms like nausea, headache, or dizziness. These signs usually appear a few hours after the bite and go away with rest and hydration.
7. Fever or Infection Signs
In rare cases, especially if the bite is not cleaned properly, a bacterial infection may develop. This could lead to fever, pus, or spreading redness. If this happens, medical treatment is needed.
False Widow Spider Bite Stage
Stage 1: Initial Bite Reaction
In the first few minutes after the bite, you may feel a sharp pain, similar to a pinprick or bee sting. A small red mark may appear where the spider bit you. This is the body’s immediate response to the venom.
Stage 2: Localized Inflammation
Within 1–3 hours, swelling, redness, and warmth may develop around the bite. The area might become itchy or tingly. This stage often includes mild discomfort but usually stays limited to the bite site.
Stage 3: Delayed Symptoms
After several hours—or up to a day—some people experience tiredness, muscle aches, nausea, or headache. A blister may form in some cases. These symptoms are not common for everyone but can occur in more sensitive individuals.
Stage 4: Healing or Complications
In most cases, symptoms fade within 2 to 3 days. The bite area may scab over or peel as it heals. If the bite becomes infected (with pus, fever, or spreading redness), medical treatment is needed. Otherwise, full recovery is expected without issues.
What to Do If Bitten by a False Widow Spider
Most false widow spider bites are not dangerous, but knowing how to respond can help reduce pain and avoid problems. Here’s what to do right after the bite and when to seek help.
Immediate First Aid
As soon as you notice the bite:
- Clean the area gently with soap and water to remove any germs.
- Apply a cold pack or ice wrapped in cloth for 10–15 minutes to reduce swelling and pain.
- Keep the affected limb elevated if possible to reduce swelling.
- Rest and stay calm. Try not to move too much, especially the bitten area.
Avoid scratching or popping any blisters, as this can lead to infection.
When to See a Doctor
Most bites heal without medical help, but in some cases, you should get checked by a doctor. See a professional if you notice:
- Increasing pain or swelling after a few hours
- Redness that spreads from the bite
- Pus or signs of infection
- Fever or chills
- Feeling very weak or sick
- Allergic reactions (like trouble breathing or swollen face/lips)
It’s always better to be safe, especially for children, older adults, or people with allergies.
Medical Treatment
Doctors may suggest treatments based on your symptoms. These can include:
- Pain relief such as paracetamol or ibuprofen
- Antibiotics, if the bite becomes infected
- Antihistamines for itching or allergic reaction
- In rare cases, steroids or hospital care may be needed if symptoms are severe
Most people recover fully in a few days with proper care.
False Widow vs Black Widow Bites:
| Feature | False Widow Spider Bite | Black Widow Spider Bite |
| Spider Species | Steatoda (e.g., S. nobilis) | Latrodectus (e.g., L. mactans) |
| Bite Pain Level | Mild to moderate pain | Severe, cramping pain |
| Initial Symptoms | Local swelling, redness, mild pain | Sharp pain, muscle cramps, sweating |
| Venom Strength | Mild neurotoxic venom | Strong neurotoxic venom |
| Systemic Symptoms | Rare, mild (e.g., fatigue, headache) | Common: nausea, muscle spasms, abdominal pain |
| Danger Level | Generally not dangerous | Can be medically serious, especially for children/elderly |
| Need for Medical Attention | Usually not required | Often necessary |
| Appearance of Bite Site | Small red bump, sometimes blister | Two puncture marks with spreading redness |
| Geographic Range | UK, Europe, California, mild climates | North America, Southern Europe, Australia |
| Aggressiveness | Bites only in defense | Bites when threatened, not usually aggressive |
Summary
False widow spider bites are usually mild and not life-threatening. Most bites cause redness, swelling, and minor pain, with symptoms fading in a few days. Unlike the more dangerous black widow, false widow venom is weaker and rarely causes serious health problems. With proper first aid and awareness of warning signs, most people recover quickly without medical treatment.
