A hard lump on the foot, depends on where it grows, according to your description should grow on the dorsum of the foot, the dorsum of the foot in the foot of several bones this place to grow, it is seven bones, this time to be careful, it is a tendon sheath cyst problem. Tendon sheath cyst on the foot, it is a painless hard lump, pressure is not painful, can except some other trauma, fracture, deformity, tumor, congenital deformity, a hard lump on the foot, in most cases it is a tendon sheath cyst, what to do at this time? Either leave it alone, because it doesn’t hurt. The second method, there is an effective method, is to use the epidural bag inside a thick needle, with 15-20 ml syringe for puncture, to draw it out, inside is jelly-like things, after puncture it will become smaller, usually will not recur, recurrence after the puncture is also possible, but usually do the surgery, it will also recur. Generally people don’t do surgery, but first we have to except some other bad diseases.