Dark spots on hands may be due to congenital hereditary factors or the influence of acquired environmental stimuli.
Most of the black spots or pigmented nevi are due to congenital hereditary factors, which can occur in various parts of the body of all ages; such black spots are generally benign, with no obvious harm to the body, and do not require special treatment.
Some dark spots can be affected by external environment, such as long-term outdoor sunlight operation, long-term stimulation of certain chemicals, etc. It is necessary to change the living environment and get rid of the external bad stimulation.
If the dark spots affect the beauty, you can also go to the dermatology or cosmetology department of local hospitals for laser treatment, and commonly used lasers are carbon dioxide laser or fractional laser, both of which have better curative effect.