Stages of frozen shoulder
The symptoms of a frozen shoulder usually get worse gradually, over a number of months or years.
There are three separate stages to the condition (see below), but sometimes these stages may be difficult to distinguish. The symptoms may also vary greatly from person to person.
Stage one
During stage one, often referred to as the "freezing" phase, your shoulder starts to ache and become very painful when reaching out for things.
The pain is often worse at night and when you lie on the affected side. This stage can last anywhere from two to nine months.
Stage two
Stage two is often known as the "frozen" phase. Your shoulder may become increasingly stiff, but the pain doesn't usually get worse and may even decrease.
Your shoulder muscles may start to waste away slightly because they're not being used. This stage usually lasts 4-12 months.
Stage three
Stage three is the "thawing" phase. During this period, you'll gradually regain some movement in your shoulder. The pain begins to fade, although it may come back occasionally as the stiffness eases.
You may not regain full movement of your shoulder, but you'll be able to carry out many more tasks. Stage three can last from six months to many years.