Rheumatoid factor 120IU/ml does not necessarily mean that you have rheumatoid, rheumatoid and other autoimmune diseases, infectious and neoplastic diseases, physiological conditions, etc. can be elevated rheumatoid factor. Under normal circumstances, the normal value of rheumatoid factor is 0~20IU/ml, rheumatoid factor 120IU/ml suggests that the rheumatoid factor is positive or elevated. 1. Rheumatoid arthritis and other autoimmune diseases: besides rheumatoid arthritis, elevated rheumatoid factor may also be associated with other immune system diseases, such as desiccation syndrome, systemic lupus erythematosus and so on. 2. Infectious and neoplastic diseases: certain infectious diseases such as tuberculosis, hepatitis B and malignant tumors can also lead to elevated rheumatoid factor. 3. Physiological conditions: Normal people, especially the elderly, may also have elevated rheumatoid factor. As age increases, the likelihood of an elevated rheumatoid factor increases, with approximately 2% to 5% of the elderly population having a positive rheumatoid factor. If rheumatoid arthritis is suspected, consult the rheumatology department of a regular hospital to identify the cause and give targeted treatment.