Foot fetishism is not classified as a mental illness . More often, however, you can hear about this phenomenon that it is a type of sexual perversion. Fetishists describe them more as a variety of sexual sensations as for Teen Foot Worship.
If the foot fetish does not offend or disturb the partner, and is not associated with violence, violent sexual behavior, etc., it does not appear to be a threat.
However, therapy is suggested to analyze life events that may have led to fascination with the feet. A sexologist , psychologist and psychiatrist can help in this regard . Appropriate treatment and support of a specialist may prove indispensable in the case of intensified fetishism.