The evaluation of a spider bite begins with a history and physical exam.

Physical findings in someone with a spider bite may include:

• Skin swelling around the bite
• Skin redness around the bite
• Skin ulcer at the bite wound

Rare physical findings in someone with a spider bite may include:

• High blood pressure
• Rapid breathing rate
• Rapid pulse
• Excessive sweating
• Tremor
• Vomiting

Usually, tests are not necessary to make the diagnosis of a spider bite.

Tests that may be used to evaluate a spider bite include:

• Complete blood count
• Kidney profile
• Urinalysis

For more information:

• Black widow spider bite evaluation
• Brown recluse spider bite evaluation
• Tarantula bites evaluation