Ear pain after riding without a helmet, with giddiness and vomiting, can be due to ear irritation or inner ear disturbance from wind exposure. Rest well, avoid sudden head movements, stay hydrated, and avoid riding or screen time until you feel better. Do not take medicines like Diziron or Vergo on your own without proper advice. If dizziness continues or worsens, or if you experience vomiting or changes in hearing, consult a doctor for proper evaluation and care.