does this yellowish discoloration remains as it is or it fades on some time ?
are your nails normal on affected hand normal?
are your eyes ,urine, stool normal in color?
do you have any other symptoms?
pigmentation can be due to Jaundice
, carotaenimia, pigmentation problems, lymphedema
you better see a physician or dermatologist
for your problem.
‘Hope I have answered your query, I will be available to answer your follow up queries.
“Wish you Good Health”