In general, nevus pigmentosus will not disappear on its own. If it disappears gradually, it may not be a nevus, but a common wart, flat wart or other skin diseases.
Nevus pigmentosus is formed by the abnormal aggregation of pigment cells, under normal circumstances, nevus pigmentosus will not disappear on its own, with the prolongation of time, nevus pigmentosus may increase in size, and a very small portion of nevus pigmentosus may undergo malignant changes, if there are no external factors to intervene, it rarely disappears on its own.
The ones that disappear on their own may be misdiagnosed due to other skin diseases, such as common warts, flat warts, etc. Most of these diseases do not disappear on their own. Most of these diseases do not go away on their own, but they may disappear on their own when the immune system improves or after a longer period of time.
If you have a mole on your right hand, you can go to the dermatology department of a hospital to get a clear diagnosis and then do the appropriate treatment.