The evaluation of alopecia begins with a history and physical exam.

Physical findings in alopecia include:

• Hair loss

Tests may identify an underlying cause for alopecia.

Blood tests used to evaluate alopecia may include:

• Antinuclear antibodies
• Complete blood count
• DHEA blood level
• Free testosterone level
• T and B cell lymphocyte counts
• Thyroid profile
• Syphilis test

Other testing used to evaluate alopecia include:

• Hair pull test
• Microscopic examination of the hair follicle
• KOH preparation:
• To look for fungus of the scalp
• Scalp biopsy

For more information:

• Alopecia areata evaluation