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.
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.