Frozen Shoulder is a condition where your shoulder capsule gets frozen and restricts the Range of Motion greatly. Shoulder becomes very painful and restricts the day to day activities as well. Prevalence is quite high in Females than in Males. Day to day activities also contributes to this when it comes high prevalence in females. As it stays stiff your brain forgets that your shoulder be moving. On top it we stop using our shoulder even if it feels better. Once the mobility and the pain is better you should start using the shoulder at the pain free range, so that the Brain develops muscle memory in turn it would help in making your shoulder mobile as well. And working on the Muscular Imbalances would help in improving the Range in shoulder.