People may like horror for many different reasons.
Personification of non-human's, perspective, etc.
There's some considerate guidelines to take in-to account.
Of course, horror's meant to be scary, but not to frightening as to cause panic attack.
Trigger warnings may give away the ending or some plot twist. Here are some tips:
~Profanity. Can say like 'oh dear' or something.
~Gore, avoiding unnecessary graphic detail.
~Animals. Can be something like 'the dog growls at presence of ghost'
~Self harm, etc. You can, however, have a character sacrifice oneself.
~Abuse (like exploitation, arranged marriage) although you can imply abduct, poison, etc.
~Stereotyping groups (portraying certain authorities, religions, cultures, etc. as disrespectful)
You can use (with discretion) controversial topics (execution, foeticide, the double effect, etc.) lightly.
You can mention potential topics (cannibal, baby death, poisons, apocalypse, etc.) in story insofar as it partains to the plot, but no glorifying trauma.
You can have the narrator be the villain, victim, or bystander.
Have fun writing, and heed your emotions!