Inexplicably swollen toes may be caused by connective tissue disease, gouty arthritis, infectious diseases and trauma. 1. connective tissue disease: such as rheumatoid arthritis, etc., synovial inflammation caused by synovial membrane swelling and inflammatory fluid exudation, may appear toe joint swelling. 2. Gouty arthritis: gout patients due to urate deposition in the toe joints, can cause inflammation and edema of the tissues around the joints, causing inexplicable swelling of the toes. 3. Infectious diseases: the toes are attacked by pathogens, such as bacteria or fungi, which can cause inflammatory exudation, and the symptoms of swollen toes can appear after invading the toe area. 4. Trauma or mosquito bites: It is possible that the toes have been traumatized in an inconspicuous way, such as mosquito bites or bumping into the toes, which can cause swelling of the toes. It is recommended that the crowd of inexplicably swollen toes go to the regular hospital in time, clear cause, standardized treatment under the guidance of the doctor.