Patients with congenital vertical talipes often present with a loss of arch or a plantar bump, which appears prominent on the medial and metatarsal sides of the foot due to the prominence of the head of the talus here. Plantar bumps can be categorized into bony deformities and soft tissue lesions. Bony deformities are mainly the dorsal joint of the navicular bone with the neck of the talus, which locks the talus in a vertical position. The head of the talus is flattened or ovoid above the head, and the neck of the talus is shortened by dysplasia, forming an articular surface dorsally. The proximal articular surface of the navicular is tilted toward the metatarsal side. The heel bone is displaced posteriorly and laterally. The anterior portion of the heel bone is deflected laterally and flexed to the metatarsal side. The carrier talon is hypoplastic and loses its role in supporting the talus. The lateral column of the foot is depressed and the medial column is relatively long. The soft tissues are also markedly altered. Contracture of the tibial navicular ligament and the dorsal talocalcaneal ligament are the main factors affecting repositioning. Contracture of the divergent collateral ligament causes abduction of the foot. Contracture of the intertrochanteric ligament and the calcaneofibular ligament prevented the repositioning of the heel bone to the posterior-lateral displacement. In contrast, the calcaneo-plantar collateral ligament, talo-plantar and medial joint capsules are elongated. The tibialis anterior, phalanges, extensor digitorum longus, peroneus brevis, and calf triceps are hypertonic due to contracture. The tendons of the peroneus longus and tibialis posterior move anterior to the ankle and act as dorsal extensors). Plantar bone tumors can cause a plantar bump Bone tumors are tumors that occur in the bones or their collateral tissues. There are benign and malignant, benign bone tumors are easy to cure and have a good prognosis, while malignant bone tumors develop rapidly, have a poor prognosis and a high mortality rate. Malignant bone tumors are divided into primary and secondary. Malignant tumors from other tissues or organs in the body metastasize to bones through blood circulation and lymphatic system as secondary malignant bone tumors. There is also a class of lesions called tumor-like lesions. The tissues of tumor-like lesions do not have the characteristics of tumor cell morphology, but their ecology and behavior have the destructive nature of tumors, and they are generally more limited and easy to be eradicated. The pathogenesis of bone tumors is complex and there is no exact etiology. The internal causes are quality theory, gene theory, endocrine theory, etc. The external causes are chemical element substance and internal and external irradiation chronic stimulation theory, viral infection theory and so on. Some multiple osteochondromas and fibromyxoid proliferative disorders are related to family inheritance. Benign tumors of bone can become malignant: for example, multiple osteochondromas can become chondrosarcomas.