just got back from a quick turnaround flight overseas yesterday, and all day today it’s sort of felt like there’s something under the ball of my right foot. no real pain, per se, but it’s like there’s piled up under there (a sock, an insole, something). my physical activity, diet, etc have been totally normal lately. i’m a bit underslept. long history of autoimmune problems, but otherwise fit, healthy 31-year-old man.
I am not a doctor so I have no idea but flying + leg/foot pain sounds like a case of Thrombosis. My family is known to have problems with it so I always travel with compression pants and get up and walk around regularly. In any case, you should see a doctor.