Use a static Boolean flag or a trigger handler pattern.

Problem Explanation

Triggers can fire repeatedly due to record updates caused by automation or Apex logic.

Root Cause(s)

1. Update DML inside triggers

2. Workflow, Flow, or Process Builder updates

3. Missing recursion control

Step-by-Step Solution

1. Create a static variable in a helper class

2. Exit trigger logic if flag is already set

Edge Cases & Variations

1. Multiple triggers require a shared handler

2. Flows can still cause recursion indirectly

Common Mistakes to Avoid

1. Using non-static variables

2. Relying only on trigger context