Had root canal 7 days ago pain subsides completely durring the day but wake up at night with severe ear and tooth pain ?

Re-evaluation: Have the tooth re-evaluated. You may still have an infection, or at a minimum, inflammation at the tip of the root.

Sign of complication: As a general rule, if post-root canal treatment the pain is persists or worsens, see your dentist for examination and treatment.

Not norma: Not normal. Root canals not 100% success rate. See dentist who did root canal for assessment. Consider second opinion.

Not normal: May still be some residual infection, an accessory canal, fracture, etc. Pls return to treating Dentist or specialist Endodontist for reevaluation.