Uneven pits on the nails may be caused by nutritional deficiencies, mold infections, eczema or traumatic impacts, or other factors. 1. Nutritional deficiencies: uneven pits on the nails may be caused by deficiencies in trace elements, vitamins or other nutrients. To understand the condition, tests for nutritional elements are needed, including tests for calcium, zinc and potassium. Treatment requires timely supplementation of the deficient nutrients. 2. Mold infection: Nails infected by mold may also lead to uneven nails. The affected nails may also show color changes, thickening of the nails, and patients may also be accompanied by itching. 3. Eczema: Eczema on the skin around the nails can also affect the shape of the nails, resulting in uneven nails. 4. Trauma: Trauma to the nails can lead to uneven pits on the nails. 5. Other factors: autoimmune diseases, including lupus erythematosus and lichen planus, can lead to uneven nails. Patients with uneven nails should consult a doctor to find out the cause of the pits, and take active treatment under the doctor’s guidance to avoid delaying the condition.