There isn't a perfect moment to tell
Before the first date? During the third? After you know whether you even like them? It's understandable to want a rule. But your history is personal, and how much you share can depend on trust, safety, and what feels relevant to the relationship.
You can start with a little and stop there. ‘Cancer has been part of my life. I'm okay talking about some of it, but not all of it tonight.’ You don't owe a new person a complete account to prove you're being honest.
The relationships that were already there
An existing partner might know every appointment and still not understand how you're feeling now. You might be grateful for their care and miss being seen as someone they desire, rather than someone they need to watch over.
There's room to talk about closeness, resentment, tenderness, and the practical fatigue of sharing a household. Being supported doesn't cancel your right to need something different. Being single isn't a problem this section is trying to solve.
Your body doesn't owe anyone access
Changes in comfort, desire, or how you feel about being touched can be difficult to put into words. You can want affection without wanting sex. You can change your mind. You can ask for a slower pace without apologizing for your body.
We write about conversations, boundaries, and being seen beyond a diagnosis. For pain or other physical concerns, your care team can help you explore appropriate support. You don't have to push through discomfort to protect someone else's feelings.