Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
And for anyone, someone who:
Report fever, chills, new bleeding, exposure to certain infections, uncontrolled vomiting or diarrhea, worsening pain, or new neurologic symptoms promptly.
Do not start medicines, supplements, or vaccines without checking with the treatment team because some may interact with therapy or may not be appropriate during periods of weakened immunity.
And for anyone, someone who:
During treatment, follow-up is frequent.
Blood counts help the team measure marrow recovery, infection risk, and bleeding risk.
Bone marrow examinations and MRD testing show how well the leukemia is responding.
Other tests monitor the liver, kidneys, heart, or nervous system when relevant to the treatment being used.
Follow-up looks for relapse, treatment-related health effects, and emotional or practical concerns.
Survivors may receive a written care summary describing their diagnosis, treatment exposures, and recommended long-term monitoring.
Routine primary care remains important.
This includes age-appropriate preventive care, dental care, physical activity, and vaccinations coordinated with the oncology team.
New symptoms do not always mean that leukemia has returned, but persistent or unexplained changes should be discussed rather than waiting for the next scheduled visit.
The article also says
Keep the oncology team’s contact information available.
After treatment, visits gradually become less frequent.
Every sign above is quoted from the sofidex article on Acute lymphoblastic leukemia. If you are not sure, err upward — it is always reasonable to be checked.