The general causes of redness, swelling and hard lumps in the feet of babies mainly include the following aspects. First of all, due to children suffering from insect bite dermatitis caused by the symptoms of the feet of mosquito bites, often caused by biting parts of the red, swollen and hard lumps, can be timely application of eau de toilette coated. Secondly, due to children caused by frostbite, frostbite can also cause feet red and swollen with hard lumps, the need for timely insulation. In addition, due to the symptoms caused by children suffering from hand, foot and mouth disease, after the occurrence of hand, foot and mouth disease will not only cause localized redness and swelling of the feet with hard lumps, often also cause herpes on the hands and mouth.