The information provided here is not a replacement for a doctor. You shouldn't use it for the purpose of self-diagnosing or self-medicating but rather so you can have a more informed discussion with a professional TCM practitioner.
In Chinese Medicine numbness in the joints can be treated by one herbs that we have on record. Here is the list below.
Mulberry twigs might help with numbness in the joints
Why might Mulberry Twig (Sang Zhi) help with numbness in the joints?
Because it is a herb specifically indicated to treat numbness in the joints as can be seen on Mulberry Twig's page.
Mulberry Twigs is a Cool herb that tastes Bitter. It targets the Liver.
Its main actions are: Relieves pain and numbness due to obstruction of Wind Dampness. Improves motility of joints. Facilitates urination.