In short, you cut this mazol and it is easy to do everything further, and whoever doubts, he ashibits, but whoever makes a mistake, such things study as necessary
Occurs during mechanical friction, as mentioned. But you certainly shouldn't cut it off. It is better to make several punctures, removing the liquid and treating with iodine. I always do this for dropsy.
Corn is formed after mechanical rubbing of the skin. As a result, there is a delimitation of the horny and basal parts of the epidermis. In the resulting focus of softening, the effusion of the transudate occurs. Transudate is a serous fluid similar in composition to blood plasma. In no case is it recommended to open the callous sac. Otherwise, a drift of microorganisms will occur and a focus of infectious inflammation will appear.
Corn is a mechanical damage to the skin. The skin is like a puff cake. It consists of dense layers of cells; these layers are dense in themselves, but fastened together a little less securely. Prolonged friction and / or pressure leads to the fact that the top layer of the skin turns horny (read: dead) and lags behind the underlying - a "dry" callus is obtained. If in the process deeper layers of the skin or even capillaries are damaged, then the formed skin "bladder" can be filled with lymph or blood.
In terms of the threat of calluses in the risk group, wet feet in tight shoes (wet skin becomes less even and experiences more severe friction against shoes and a damp sock, for example) or, on the contrary, dry hands in contact with a dusty rough tool or a heavy load with uncomfortable handles (for example, dust and sand particles on the handle of a shovel additionally irritate the surface of the skin, accelerating its keratinization and death).
By the way, it is not recommended to just cut / puncture the calluses without additional treatment, because the next layer of skin itself is more delicate, it is also additionally irritated and, possibly, damaged by the same friction. Having cut off such a callus, you will not only experience severe discomfort for some time when touching the damaged area, but you can also bring some nasty stuff there.