This image displays the subtle pits, or depressions, in the skin of the foot typical of pitted keratolysis.
This image displays the subtle pits, or depressions, in the skin of the foot typical of pitted keratolysis.
This image displays pits and areas of subtle color change on the bottom of the foot (plantar foot) typical of pitted keratolysis.
This image displays pits and areas of subtle color change on the bottom of the foot (plantar foot) typical of pitted keratolysis.
This image displays how pitted keratolysis may have red areas that peel, rather than the typical multiple pits.
This image displays how pitted keratolysis may have red areas that peel, rather than the typical multiple pits.

Images of Pitted Keratolysis (3)

This image displays the subtle pits, or depressions, in the skin of the foot typical of pitted keratolysis.
This image displays pits and areas of subtle color change on the bottom of the foot (plantar foot) typical of pitted keratolysis.
This image displays how pitted keratolysis may have red areas that peel, rather than the typical multiple pits.

Pitted Keratolysis

Pitted keratolysis is a skin condition affecting the soles of the feet and, less commonly, the palms of the hands. It is caused by a bacterial infection of the skin and may give off an unpleasant odor.

Who's At Risk?

Pitted keratolysis can occur in people of any race, any age, and either sex, though it is more common in males. Conditions that make people more likely to develop pitted keratolysis include:

  • Sweaty feet
  • Hot or humid weather
  • Unventilated footwear, such as rubber boots or vinyl shoes

Athletes and military personnel tend to develop pitted keratolysis most commonly.

Signs & Symptoms

The most common locations for pitted keratolysis include:

  • Pressure-bearing sites on the soles of the feet, especially the heels
  • Non-pressure-bearing sites on the soles of the feet
  • Palms of the hands

In these areas, the condition appears as white patches studded with small (0.5–5 mm), shallow pits in the superficial skin. These pits can sometimes join together (coalesce) to form larger, crater-like lesions.

Pitted keratolysis may occasionally be itchy or painful. The foot odor often associated with pitted keratolysis may be socially embarrassing.

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Symptom checkers like Aysa can help narrow down possible skin conditions by analyzing a skin photo.

Self-Care Guidelines

With pitted keratolysis, keeping the feet as dry as possible is important. Have your child try the following:

  • Wear absorbent cotton socks and change them frequently.
  • Wear wool socks, which may wick moisture away from the foot.
  • Wash the feet with antibacterial soap or antiseptic cleanser daily.
  • Consider using a hairdryer to dry feet thoroughly after washing.
  • Apply antiperspirant to the soles of the feet daily.
  • Minimize the use of tight-fitting, unventilated footwear. (Try sandals if possible.)
  • Avoid wearing the same pair of shoes 2 days in a row.
  • Avoid sharing towels and footwear with others.
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Treatments

In addition to recommending the above steps to minimize moisture, a physician may try:

  • Prescription-strength antiperspirant containing aluminum chloride.
  • Prescription antibiotic lotions such as clindamycin, erythromycin, or mupirocin.
  • Antifungal cream such as miconazole or clotrimazole.
  • Prescription oral antibiotics such as erythromycin.

With some combination of these treatments, the skin lesions and odor of pitted keratolysis usually disappear within 4 weeks.

Visit Urgency

See your child’s doctor or a dermatologist if attempts to minimize moisture do not improve the condition.

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References

Bolognia, Jean L., ed. Dermatology, pp.1129. New York: Mosby, 2003.

Freedberg, Irwin M., ed. Fitzpatrick’s Dermatology in General Medicine. 6th ed, pp.1875-1876. New York: McGraw-Hill, 2003.