Overview
The jar lid is bulging outward due to gas pressure.
Severity Snapshot
Risk level: Typically normal
Common Causes
- •Active fermentation releasing CO2
- •Natural color or aroma shifts
- •Healthy microbial activity
- •Minor oxygen exposure above the brine
What To Do Now
- •Continue fermenting while monitoring daily
- •Keep vegetables fully submerged
- •Burp jars or maintain airlock pressure
- •Taste periodically to confirm flavor
Prevention Tips
- •Keep vegetables submerged under brine
- •Use consistent salt measurements
- •Ferment within recommended temperature ranges
- •Clean jar rims after packing
When to Discard
Discarding is rarely needed for this symptom alone. Trust your senses and discard only if odor or appearance turns unsafe.