The evaluation of a brown recluse spider bite begins with a history and physical examination.

Physical findings in those with a brown recluse spider bite may include:

• Discoloration of the skin at the bite site
• Skin ulcer formation at the bite site

The diagnosis of brown recluse bite is usually made without testing.

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

• Complete blood count
• Urinalysis