[Tungiasis, an uncommon ectoparisitic disease].

Tungiasis is an infestation of the skin due to the sand flea chigger (or Tunga penetrans). After penetration under the nails of the feet, this ectoparasite enlarged and the lesion becomes painful. Diagnosis is made on the past history (travel in tropical areas) and the inspection. Treatment consists of extraction the insect entire, and administration of topical antiseptic lotion.