Spider Bites: Myths, Facts and When to See a Doctor

Many skin problems are blamed on spider bites, but true spider bites are less common than people think.

The short answer

Most spiders do not bite people unless trapped or handled, and most bites cause only mild redness and swelling. Other things such as mosquito bites, infections and other insects are often mistaken for spider bites. Wash with soap and water, apply a cold pack and watch the area. See a doctor for severe pain, spreading redness, ulceration, fever or breathing problems, or if a child is bitten. This is general information.

Myths

• Every unexplained bump is a spider bite.
• All spiders are venomous to humans.
• Spiders hunt people.

Facts

• Most bites are minor.
• Serious reactions are rare.
• Allergic reactions can occur.

First steps

1. Wash with soap and water.
2. Apply a cold compress.
3. Avoid scratching.
4. Monitor for changes.

See a doctor

• Severe pain, swelling or spreading redness.
• Skin breakdown, fever or breathing trouble.
• Bites on children or vulnerable people.

When to call a professional

See a doctor for any serious reaction. This guide is not medical advice.

Frequently asked questions

Can I identify the spider?

If safe, take a photo or capture it for the doctor.

Do I need antibiotics?

Ask a doctor.

Are bites common?

Not very.

Can I prevent bites?

Shake shoes and clothes, wear gloves for storage work.

This guide is part of IPest's complete resource on household pest control. For identification help, prevention and treatment options, see our full household pest control guide for Bangalore.