Here is what yoga butt is and these exercises suggested by expert will help you fix it if you have it.
Posterior Chain Awakens: 5 Poses to Overcome Yoga Butt - YOGA
Yoga for your Butt
Butt Pain: How Yoga Can Help
Avoid Yoga Butt
How To Treat And Heal A 'Yoga Butt
Stretches to Improve Downward Dog
8 Effective Yoga Asanas To Tone Your Buttocks
31 Yoga Poses for Beginners
Yoga for Flexibility: 11 Poses to Try