Most spider bites cause only minor injury. Bites from a few spider species can be dangerous.

Seek medical care right away if:

• You were bitten by a dangerous spider, such as a black widow or a brown recluse.
• You're unsure if the bite was from a dangerous spider.
• You have severe pain, stomach cramping or a growing wound at the bite site.
• You're having problems breathing or swallowing.
• The area of inflamed skin is spreading or has streaks.

To take care of a spider bite:

• Clean the wound with mild soap and water. Then apply an antibiotic ointment three times a day to help prevent infection.
• Apply a cool cloth over the bite for 15 minutes each hour. Use a clean cloth dampened with water or filled with ice. This helps reduce pain and swelling.
• If possible, raise the affected area.
• Take a nonprescription pain reliever as needed.
• If the wound is itchy, an antihistamine might help. Examples are diphenhydramine or cetirizine. Or try calamine lotion or a steroid cream.

For pain and muscle spasms, your healthcare professional might prescribe pain medicine, muscle relaxants or both. You might also need a tetanus shot.