Nail tumors can manifest with various symptoms arising from the deterioration of the nail structure and shape. These symptoms include deformities such as cracking, thickening, or breakage of the nails, and the formation of masses or swelling beneath the nail. In the case of malignant nail tumors, changes in nail color, significant swelling under the nail, and bleeding may be observed. Furthermore, the spread of black or brown discoloration on or around the nail plate, nail bed, and non-healing wounds are also important indicators of malignant tumors.

Nail tumors are frequently mistaken for nail fungus, which can lead to misdiagnosis and consequently, delayed treatment. Treatments applied under the assumption of nail fungus can delay the treatment of an early-stage nail tumor, allowing the disease to progress.

Benign or malignant nail tumors can generally be treated successfully when diagnosed early and before they have progressed. However, late-detected nail cancer can spread to other parts of the body and internal organs, posing a vital risk. Delays in early diagnosis can lead to serious consequences, including the amputation of the affected finger or joint.