I have breath cancer metastasis, can I use botox on my face?

Botox is very safe and should be fine as long as you do not have metastasis to the brain causing a neurologic disorder.   Botox can be placed safely as the dosing for cosmetic dosing is so small.   If you are feeling down - botox can help to elevate your mood and it's been correlated with improvement in people with depression.   I would still discuss this with your oncologist but we have treated patients with breast cancer and they have done well.

I would discuss this with your oncologist before doing any Botox. Cancer and botox have not been studies together closely so not a lot of research is out there for this topic.

Sorry for your serious medical issues. I see no reason not to use BOTOX on your facial areas if indicated. Best call a few injecting MDs to see if their office has any issues injection you.