In trained persons the latissimus dorsi muscle is responsible for the beautiful V shape of the back.
But if it is tight or contains trigger or tender points, it may be your source for mid back and lower shoulder blade pain.
When trigger points are present in your latissimus, they can give you pain right at their location and send pain to other, seemingly unrelated areas of your body.
The upper trigger point – X1, shown under “Attachment Points” – very often may give you a painful lower shoulder blade and mid back pain.
Furthermore, pain can radiate over your shoulder blade and down the backside of your arm till it reaches your 4th and 5th finger.
Although not shown in the pictures, you also could experience pain at the inner side of your arm and hand – also 4th and 5th finger –.
The lower trigger point – X2 – mainly sends pain to the front of your shoulder and to the side of your body just above your hip.
Your latissimus dorsi muscle can contribute to the following pains:
The darker the red in the pictures below, the more common it is that you experience pain in those areas when trigger points in your latissimus are present.
Usually, tight muscles that contain trigger or tender points, impair certain movements or make them painful.
Mostly those movements are the ones where the muscle has to work/shorten or the ones where it gets stretched.
The latissimus however is somewhat special here.
It will not give you too much trouble while using it, even if it is tight or has trigger or tender points.
This way you might not really feel that something is wrong with this muscle.
If there are any movements that may be painful, then those are the ones where you reach in front and above – thus stretch your latissimus –.