Dark patches of skin on the knuckles are common because they are the most exposed parts of the skin and are subjected to a lot of friction, but for some people, these dark patches are more pronounced and could indicate a health problem.
Four factors that can cause dark knuckles are:
Deficiency in vitamin B-12
Dietary nutrients, or a lack thereof, can result in darkened knuckles. According to research, knuckle pigmentation could be an outward sign of a vitamin B-12 deficiency. Other symptoms to look out for include weakness, constipation, and so on.
Another cause of dark knuckles has been linked to the use of specific drugs, which are known to cause hyperpigmentation. Anticoagulants, certain antibiotics, nonsteroidal anti-inflammatory drugs (NSAIDS), and oral contraceptive pills are among them.
Patches of skin on various parts of the body, such as knuckles and joints, darken and thicken as a result of this condition. This condition is not contagious and is not harmful in and of itself, though some people may experience itching in the affected areas.
Acanthosis Nigricans can indicate the presence of deeper health issues such as diabetes, hormonal imbalances, or even cancer, so if you notice your knuckles or patches of skin becoming darker and itchy, see your nearest health consultant.
Creams that lighten the skin
Most lightening products contain harsh ingredients such as lipohydroxy acid, a derivative of salicylic acid. The acid whitens the skin quickly by destroying melanocytes, which produce melanin, the pigment that gives the skin its natural brown color and to which the skin reacts, especially in highly pigmented areas like the elbows and knees. It fights it by increasing melanin production in those areas.