A little pain when stepping down on the soles of the feet is mainly seen in the following diseases: 1, consider plantar tendonitis, due to recent excessive sports, or long-time physical labor, weight-bearing activities, may cause the plantar tendon membrane is subjected to more loads, and over time the plantar tendon membrane will gradually produce strain and aseptic inflammation, which manifests itself as plantar tendon pain, and when stepping down on the soles of the feet, a localized pain will appear. 2, consider subtalar bursitis The cause of subtalar bursitis is similar to that of plantar tendonitis, which is also caused by excessive weight-bearing activities and sometimes related to wearing inappropriate shoes such as high-heeled shoes. In the case of subtalar bursitis, there is often pain under the heel bone. If pain occurs under the heel when stepping down, it is usually considered to be subtalar bursitis.