Uneven nails may be caused by a fungal infection if they have just formed in a short period of time. Microscopic examination is needed to see if there is fungus, and if it is positive, antifungal treatment is needed. You can take oral itraconazole, or terbinafine, etc. You can use topical amorolfine application twice a day. If it is hypertrophic, topical filing is needed to remove the infected nail and then apply amorolfine. In addition to fungal infection, if the fungal test is negative, the nail may be nail dystrophy. If it is nail dystrophy, it is mostly due to the nutritional dysfunction of the nail matrix, you can apply topical polysulfate mucopolysaccharide cream to the nail matrix at the root of the nail.