Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency care for severe trouble breathing, chest pain, coughing up blood, fainting, uncontrolled bleeding, or sudden weakness, facial drooping, confusion, or difficulty speaking.
Contact the oncology team promptly about fever during chemotherapy, rapidly worsening swelling or redness, a painful swollen arm, uncontrolled vomiting, or side effects that make it difficult to drink or take medicines.
Follow-up care checks for recurrence, manages treatment effects, and supports general health.
The schedule depends on the cancer and treatment received.
For many people treated for early-stage breast cancer, follow-up includes symptom review, physical examination, and mammography of remaining breast tissue.
Routine CT scans, PET scans, bone scans, or blood tumor-marker tests are generally not used when there are no symptoms or examination findings suggesting recurrence.
Follow-up also includes routine primary care.
Vaccinations, bone health, heart health, physical activity, and screening for other cancers remain important.
Ask which clinician will manage each part of care.
And for anyone, someone who:
The article also says
Keep an updated treatment summary and list of medicines.
Tell the care team about new breast or chest-wall changes, a persistent new lump, unexplained bone pain, ongoing cough, unusual shortness of breath, severe headaches, weakness, or unexplained weight loss.
These symptoms often have causes other than cancer, but they deserve assessment.
Every sign above is quoted from the sofidex article on Breast cancer. If you are not sure, err upward — it is always reasonable to be checked.