Flesh spurs on the hands may be barbs, which are associated with vitamin B or vitamin C deficiency, or warts, which are associated with viral infections and have no correlation with vitamin deficiency. Barb: Barb on the hand, may be related to dry skin on the hand, contact dermatitis, vitamin deficiency and other factors. You should consume more fresh vegetables and fruits to replenish your body with vitamins and trace elements, and also pay attention to moisturizing your hands and avoid contact with irritating or allergenic substances. Warts: Papillomavirus infection on the hands can easily cause warts on the hands, which appear as hard spikes. If the warts are caused by viral infection, they can be treated with laser therapy, cryotherapy or surgery under the guidance of a doctor. So this situation, you should go to the hospital in time for a detailed examination to clarify the cause of the disease and then targeted treatment.