Nail soft lack of nutrients are mainly amino acids, nutrients and vitamins. 1. Amino acids: nails are a special kind of keratin, evolved from the epidermal cells, if the amino acid deficiency, can lead to protein synthesis obstacles to make nails soft, so should be appropriate amount of supplemental amino acids such as infusion of compound amino acids. 2. Trace elements: nails belong to a special bone, such as lack of nutrients in the synthesis process, such as calcium, iron, zinc, etc. can lead to synthesis obstacles to soften the nails, through a moderate amount of exercise, sun exposure, if necessary, under the guidance of the doctor to supplement calcium and other trace elements. 3. Microbiotics: such as the lack of vitamin A, B, D, etc., will affect the synthesis of finger nail structure, so that the texture of the nails appear abnormal, resulting in thinning and softening of the nails. Soft nails may also lack of other nutrients, should be timely to the hospital to do the relevant examination and follow the doctor’s instructions standardized treatment. In addition, soft nails may also be associated with frequent exposure to certain chemicals, such as detergents or manicure agents, and genetic factors.