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 beriberi can be treated by one herbs that we have on record. Here is the list below.
Black atractylodes rhizome might help with beriberi
Why might Black Atractylodes Rhizome (Cang Zhu) help with beriberi?
Because it is a herb specifically indicated to treat beriberi as can be seen on Black Atractylodes Rhizome's page.
Black Atractylodes Rhizomes is a Warm herb that tastes Bitter and Pungent. It targets the Spleen and the Stomach.
Its main actions are: Dries Damp and tonifies the Spleen. Relieves the Exterior for invasion of Wind-Cold-Damp. Relieves Wind-Damp painful obstruction. Dries Damp for either Damp-Cold or Damp-Heat when combined with the correct herbs. Clears the eyes and improves sight.
Other symptoms often associated with beriberi
Rheumatic athralgia Edema Loss of appetite Diarrhea Poor eyesight Joint pain Impaired vision Blurred vision