Periods pain is common in many women. If severe then please do consult doctors. Yoga is a life style and promotes positive health. Yoga asana plays an important role in pain management during periods. Try to avoid inverted postures like sharvangasana. General stretch is recommended. Plz include
1. tadasana
2. Ardhakati Chakrasana
3. Ardha Chakrasana and
4. Baddha Konasana in your practice
During periods
5. Sarvangasana
6. Viparita Karachi
7. Halasana
8. Setubandhasana other days regular practice
With pranayama like Nadishudhi or Anuloma Viloma