Advice please

Over the past few nights my baby ain’t been sleeping wel atal! He is 5 months and he has always slept through the night! Now he is tossing, turning , fidgeting, and just looking as if he is in discomfort.. after watching it for a few days I have thought it may be some trapped gas/wind as he is always pulling his legs up crying and will let out some wind and then look more comfortable afterwards..

What are some ways I can help him release all of his wind before bed and throughout the day?