If you suspect lice infestation (pediculosis), you can try a nonprescription medicine or visit your doctor to double-check your symptoms. Call a doctor if:

• You have severe nighttime itching that does not go away after a few days.
• You see live lice or new eggs (nits) after using the medicine (prescription or nonprescription).
• You develop serious side effects after using a product to treat lice.
• Signs of a skin infection develop. These may include:
  • Increased pain, swelling, heat, redness, or tenderness.
  • Red streaks extending from the affected area.
  • Continued discharge of pus.
  • Fever of 100F or higher with no other obvious cause.

Many medicines that treat lice can be harmful if overused or used improperly. Follow the directions exactly as labeled. Never use a product more than twice (with at least 7 days between each use) without first consulting a doctor.

Watchful Waiting

Lice will not go away without proper treatment. Even if they don't bother you much, lice can be spread to other household members, sex partners, or other people you may have close personal contact with. If you think you have lice, try a nonprescription medicine or call a doctor.

Who To See

If you need help treating a lice problem, contact any of the following:

• Local health department
• Nurse practitioner or physician assistant
• Internist
• Pediatrician
• Family medicine doctor
• Gynecologist (for pubic lice)
• Dermatologist

A pharmacist can answer your questions about medicines that treat lice.

To prepare for your appointment, see the topic Making the Most of Your Appointment