If your throat is stiff, then the musculus extrinsic laryngis is obviously hardened.
The following photo shows when the throat is stiff.
The condition is as follows:
(1)The vocal cord and around the false vocal cord become engorged with blood(hyperemia)
(2)The vocal cord is swollen
(3) Vocalizing causes straining to the false vocal cord
(4) The arytenoid cartilageis is adducted significantly
(5) The shape of arytenoid cartilageis is not normal when adducting
(6)Bubble appears in throat because the vocal cords close tightly
(7)Decreased levels of mucus in the piriform recess (feeling of having phlegm in your throat, even when there is none)
(8)The resonance chamber of the laryngeal ventricle is diminished in size
If you keep letting out your voice with the above conditions, the edges of the vocal cord will touch together. This chafing or rubbing together of the vocal cords causes vocal nodules or polyps which will form around the area of the rubbing. This can lead to capillary damage in the vocal cords.
Furthermore, inactive muscles will make poor blood circulation in the superior laryngeal artery from the external carotid artery as well as reduce oxygen.
The following photo is the status of the external carotid artery.
The red circle is the superior laryngeal artery, and shows poor blood circulation.
If you keep letting out your voice with a stiff throat you will not only decrease the performance of vocalization, but also have many problems your the voice.
If you feel you may have the above mentioned symptoms, such as a daily stiffness in your throat, please fix this issue. You should see a throat specialist, rest your voice and also gargle with salt water.