painful shoulder blades the gas you are referring to is technically not a gas but its called taut bands, muscle nodule surely they feel and sometimes sounds like gas bubbles in your shoulder ...but you can put it this way they are is scattered islands of cramps in your back muscles.and we all know that muscle contracts more when its cold hence inducing more cramps they are scientifically known as myofascial pain syndrome or fibromyalgia treatment can be physical therapy, trigger point injections medications such as etoricoxib 120mg once a day or eperisone hcl 50mg tab every 8hours can help but the cure is still correcting the poor posture or eliminating or decreasing stress usual cause is stress (tenses muscles) and poor posture at work (forward head posture, round back posture)