According to the USDA, heavy cream can be stored in the refrigerator (opened or unopened) for up to a month. 1  This assumes that it has been kept at a constant refrigerator temperature and not left out on the counter for stretches of time. Discard any cream with mold or an off odor.
However, one of the most common causes of lockjaw, as already mentioned, is TMJ disorder. TMJ disorder refers to a syndrome that affects the temporomandibular joint, commonly called the TMJ, which connects the jaw with the bottom of the skull.
What could be causing numbness in my jaw? I'll try to explain. Just recently the left side of my jaw has been feeling slightly numb, although that isn't a great word to describe how it's feeling. It's just a tight feeling inside of the muscles of my face, it feels like that side of my mouth isn't wanting to move properly. Although when I look in a mirror it seems to move fine.