Hi. I had gone through your query. Due to frequent change in shift it causes irregular sleep wake cycle and need to follow sleep hygiene to maintain it. Shift associated insomnia can be treated with medicines like modafinil and R modafinil but if require then only. Natural way to adjust sleep cycle is sleep hygiene like, Certain routines and lifestyle modification will help you like Fix sleep schedule and stick on it No day time sleep Exercise that makes you fatigue Stress free activities and meditations Avoid alcohol and smoking Avoid heavy meal in dinner Avoid tea cofffee soft drink at night Use bed when you feel sleepy Read upto when you will sleepy No talking or use mobile in bed Calm and cool bed room All of this will help you to restore good sleep. Go for psychological screening because psychological stress also can lead to sleep problem.so treatment of it will resolve it. I hope i have answered your query. Thank you.