Scratches on the hands for no reason, mainly considered with sharp objects, minor scratches, climatic factors and other related. 1. Slight scratches from sharp objects: such as using A4 paper, flipping through books or contacting sharp objects, etc. caused by accidental loss of skin on the hands, there is a slight skin breakage, due to the loss is too slight, and did not appear obvious pain, bleeding and other symptoms, resulting in the hands were scratched only after the discovery of the incident. 2. Climatic factors: in arid areas or winter, the climate is dry and cold, and the skin is prone to cut-like or scratch-like cracks. By keeping the skin warm, moisturizing and other measures, such wounds can be significantly reduced. Hands scratches appear for no reason, it is recommended to go to the hospital for treatment, at the same time need to identify the cause, and actively on the cause of the treatment, so as not to delay the condition.