Every writer has strengths and weaknesses. I struggle with how far to spell something out when I want it to be a mystery.
Here's a technique that can be help. Have the point-of-view character note something without naming it. "Hmm," thought Sheila. "What is that large dark puddle?"
The reader thinks a-ha, blood! And it may very well be blood. Doesn't matter. If the POV character hasn't thought "blood", the reader won't know for absolute-positive sure, and they'll keep reading to see if they're right.
Published since 2009, over the years I've accumulated various items of writing
wisdom. The Third Tuesday Writing Tidbit showcases these items in no particular
order. Click here to see all 3T Tidbits.