The pain on the inside of the big toe when pressed is not gray nail, it should be the manifestation of gingivitis. Infertitis is mainly due to manicure posture is not right, resulting in local embedded nails, when walking or wearing shoes will be formed between the soft tissue and nail friction, after a long time will appear local redness and swelling. When there is no obvious infection, the redness and swelling is not obvious, and there will not be suppurative phenomenon, local pressure pain can appear. In the future, we should pay attention to the posture of manicure, try not to make the nail too short, at the same time, we should pay attention to hygiene, don’t go outside to manicure, so as to avoid the formation of onychomycosis. At present, you should apply some povidone-iodine or amyl iodine to disinfect, and wear loose shoes to avoid excessive squeezing.