Hi there Anshul. The condition you describe is commonly referred to as knuckle pads .\ There can be various causes including frictional or metabolic reasons but most commonly they occur in genetically predisposed individuals or are idiopathic in nature. Diabetes & high blood pressure do not have a direct role to play. One may try some emolllients used frequently & topical salicylic acid based creams but will require a prescription & it is perhaps best that one consults with a skin specialist dealing with cosmetology nearest you. Do hope this helps clear the air for you & the lesions will soon get better if not disappear & you grow comfortable with them. Cheers & Good luck! Dr Praveen Rodrigues MD Dermatologist, Cosmetologist, Venereologist St Martha s Hospital & Vikram Hospital, Bangalore, India.