The causes of a hard horny bump on the hand include dermatofibroma, callus, flat warts, gout and so on.
1. Dermatofibroma: If it is a dermatofibroma, due to the proliferation of fibrous tissue, this time can appear as a hard pimple like material.
2. Callus: due to the long-term friction of the hands, can trigger the thickening of keratin, so there will also be the phenomenon of hard bumps.
3. flat warts: if the human papilloma virus infection triggered by flat warts, at this time due to skin proliferation will also appear hard bumps.
4. Gout: When uric acid accumulates in the hands, gout stones can be formed at this time, so there are hard bumps.
Finally, if you have a hard horny bump on your hand, please seek medical attention.