Unilateral knee pain is not necessarily a precursor to leukemia. The following are two aspects of the causes of unilateral knee pain and the manifestation of leukemia. 1. There are many causes of unilateral knee pain, such as unilateral knee trauma, unilateral knee strain injury, joint inflammation, tumor and so on. Specific causes need to be analyzed in conjunction with relevant examinations. 2. Therefore, unilateral knee pain is not necessarily a precursor of leukemia. Leukemia has no special precursor. Some patients may have symptoms similar to cold and fever in the early stage, and some may show bleeding gums and skin or unstoppable nosebleeds. In addition, some patients may also have headache, nausea, vomiting, and progressive worsening of fatigue in the early stage. However, in general, there is no specific, specific aura of leukemia. If you have unilateral knee pain, you should seek medical attention in time to complete the relevant examinations and find out the cause under the guidance of your physician.