When are headaches dangerous

When are headaches dangerous? I get them quite a lot and was wondering, thankssmile

- When they very Severe 

- When they worsen when bending down 

- Accompanied by vision loss 

- Accompanied by stiff neck, rigid muscles, high fever, rash, 

It is very rare for a headache alone to signify something dangerous except if it is “ worsr headache of life” 

I have none of that..

Oops I meant to reply to the top person with that. Thanks I hope I’m fine since I suffer from anxiety of having a brain tumor

I have none of that so I guess I’m good