Hi Shans22,
Thank you for participating in the Apple Support Communities. We understand you'd like to delete some health data that you entered. This article has the steps to do so: Manage Health data on your iPhone, iPod touch, or Apple Watch.
"Delete information that you entered
If you entered incorrect details when manually adding health information, you can delete the record.
- Open the Health app and tap the Browse tab.
- Tap a category, like Activity.
- Tap a subcategory, like Steps.
- Tap Show All Data, then tap Edit in the upper-right corner.
- Tap the Delete button next to the record you want to delete. You can also tap Delete All to delete every record."
We hope this helps.
Take care.