Dark knuckles can also affect the hands’ beauty. This can be due to many reasons, some of which are-

Acanthosis Nigricans (AN)

It’s a condition that causes dark knuckles. It causes thick and dark patches on your skin. If you are suffering from this, consult a dermatologist.

Exposure to Sunlight 

Sometimes exposure to UV light can also result in hyperpigmentation. Our hand’s knuckles have thick skin that converts into dark patches after overexposure.

Poor Habits 

Some bad habits like not washing hands properly and using harsh soaps, etc. result in dark knuckles.

Drug Reactions 

Sometimes dark knuckles result due to bad reactions by certain medicines. Especially some acid-containing medicines. Try to avoid medicine that causes allergic reactions to your skin as some of their components are not meant for you.

Diabetes 

Dark knuckles result due to pigmentation and diabetes has a direct relation with this. For prediabetes, the darkening of knuckles is the only symptom. The dark colour of knuckles also points towards poor management towards a pre-existing diabetic condition.

To find the correct cause of your dark knuckles, visit a dermatologist.