JHS can cause a wide range of symptoms, including:
A person with JHS may also have a number of other symptoms related to weaknesses in the connective tissues throughout their body.
Some of these symptoms are described below:
JHS can cause symptoms that affect your digestive system, because the muscles that squeeze food through your digestive system can weaken.
This can cause a range of problems, including:
JHS can also cause abnormalities in the part of your nervous system that controls bodily functions you do not actively think about, such as the beating of your heart. This is known as your autonomic nervous system.
These abnormalities can cause problems when you stand up or sit in the same position for a while. Your blood pressure can drop to low levels, making you feel sick, dizzy and sweaty. You may also faint.
In some people, these abnormalities can lead to postural orthostatic tachycardia syndrome (POTS). POTS causes your pulse rate to increase rapidly within a few minutes of standing up. You may also experience:
People with JHS may have other related conditions and further symptoms, including:
Although a link is not entirely certain, it is thought that some people with JHS may be at an increased risk of developing osteoarthritis earlier in life than usual.