This problem of dark knuckle can sometimes be hereditary.
FADE OFF THOSE DARK KNUCKLE….Here is the perfect and most effective remedy for dark knuckle, knees elbows, feet and ankles. OUR NATURALLE DARK KNUCKLE SETS ARE 100% national products which will gradually fade off those difficult dark areas with consistent use. #Stubborn-knuckles

What comes in your stubborn knuckle Kit:

Kunckle Scrub
Knuckle Cleanser 
Knuckle Moisturizer

Directions on how to use your Knuckle kit:

Scrub: Apply, massage and leave for 5mins before rinsing.

Cleanser: use cotton wool to clean the affected areas only. Once a day

Moisturizer: Apply and massage with your fingers 2-3times daily

Thanks for your support!