Symptoms:

The disease begins at the site of the mite bite as a painless, firm, red lump (nodule). The nodule develops into a fluid-filled blister that bursts and crusts over. This lump may be large -- almost up to an inch wide.

Other symptoms include:

• Discomfort in bright light (photophobia)
• Fever and chills
• Muscle pain (myalgia)
• Rash that looks like chickenpox
• Sweating (diaphoresis)

The rash should clear up within a week.

Signs and tests:

The health care provider will do an examination to look for a rash similar to the one in chickenpox.

Tests include:

• Complete blood count (CBC)
• Tests of blood serum (serologic studies)