Bone tumors are tumors that occur in the bone or its appendages. Benign bone tumors are easily curable and have a good prognosis, while malignant bone tumors develop rapidly and have a poor prognosis and high mortality. Malignant bone tumors are divided into primary and secondary. Malignant tumors from other tissues or organs in the body metastasized to bone through blood circulation and lymphatic system are secondary malignant bone tumors. Pain is the main symptom of bone tumor in early stage, which is mild and intermittent at the beginning of the disease, but with the progress of the disease, the pain can be gradually aggravated and developed into continuous. Most of the patients suffer from increased pain at night, which affects their sleep. The pain can be radiated to distant places. 2. Swelling or lump Tumor located under the periosteum or superficially appears earlier, and the bone can be swollen and deformed by touch. If the tumor penetrates outside the bone, it may produce a fixed soft tissue mass with smooth or uneven surface. 3.Dysfunction In late stage of bone tumor, the function of affected part will be impaired due to painful swelling, which may be accompanied by muscle atrophy of corresponding parts. 4.Compression symptoms Tumor growing into the cranial cavity and nasal cavity may compress the brain and nasal tissues, thus causing symptoms of cranial compression and poor breathing; pelvic tumor may compress the rectum and bladder, resulting in difficulty in defecation and urination; spinal tumor may compress the spinal cord and cause paralysis. 5.Deformity Because tumor affects the development and solidity of limb bones, the deformity is obvious in lower limbs. 6.Pathological fracture As long as there is slight external force on the tumor site, it will easily cause fracture, and the swelling and pain on the fracture site will be severe. 7.Systemic symptoms Due to the consumption of tumor, stimulation of toxin and pain, a series of systemic symptoms may appear in the late stage of bone tumor, such as insomnia, irritability, loss of appetite, depression, pallor, progressive wasting, anemia, cachexia, etc. The harm of benign bone tumor Osteoma is the most benign among bone tissue tumors and rarely has malignant changes. Patients are mostly teenagers and young adults. The skull and upper and lower jaws are the preferred sites. It grows slowly and has few symptoms. When it protrudes into the cranial cavity, orbit, nasal cavity and nasal lining, it can cause compression symptoms. It is not necessary to consider treatment except for those who have caused more serious compression symptoms or excessive deformities that need to be surgically removed; however, observation should be continued because osteoma may occasionally become malignant. Treatment should include surgical removal of the tumor and a small amount of normal bone around the tumor. Otherwise, the tumor can recur or even become malignant. When it occurs in the inner plate of the skull and progresses intracranially, it may cause an increase in intracranial pressure, headache, dizziness or may be complicated by epilepsy. Osteomas develop slowly and can go undetected if they are asymptomatic and generally do not require treatment. However, if it grows rapidly and has caused hairy deformities or pressure symptoms, or if it continues to grow in adulthood, it can be surgically removed. If it can be removed completely, it usually does not recur and heals well.