Razor seedlings are kept away from the navel for several weeks to a month. A razor seedling is a body shape trimmed into a specific shape around the navel. Razor seedlings generally shave off part of the hair above the navel to form a clean straight line or other patterns. There is no fixed standard about the holding time of razor seedlings, because personal preference and growth rate will be different. The topdressing effect of razor seedlings can last for several weeks to a month. Then with the growth of hair, the appearance of razor seedlings will gradually blur. If you want to keep the razor seedlings clean, you can trim them regularly and judge the appropriate interval according to the growth speed of the individual. In addition, using some soothing skin care products in the razor seedling area, such as moisturizing cream, helps to keep the skin healthy and comfortable. Therefore, the navel of razor seedlings should be kept for several weeks to a month or so.