Welcome to HCM
What you have described are multiple abscess
may have formed from injury
which you may have not noticed and sometimes it may be just tight shoe.
These abscess may have pockets and surface at different place so please visit a Surgeon who will examine and proper systemic antibiotics and anti inflamatory drugs may be required to cure apart from dressing also if pocket of pus is there a Inscision and drainage
of pus may be done.
If it spontaneous and recurrent a blood sugar level must be checked to rule out Diabetes
Good luck to you