Black pepper and white pepper are the fruits of the same plant, pepper, just picking time is different, basically no difference in efficacy.
Black pepper is usually picked when the pepper fruit is not ripe, while white pepper is picked when the fruit is fully ripe. Black peppercorns have a stronger, more pungent odor than white peppercorns, while white peppercorns have a lighter odor.
Pepper (including black pepper and white pepper), taste pungent, hot, to the stomach, large intestine meridian, the efficacy of warming the middle and dispersing the cold (to warm the spleen and stomach medicine to dispel the cold), down the gas, eliminating phlegm, can be used to treat the stomach cold vomiting, abdominal pain and diarrhea, loss of appetite, epilepsy phlegm and so on.
Chinese medicine says that form replaces form, and relatively speaking, white pepper is more effective than black pepper in warming the lungs and resolving phlegm. In Chinese medicine, black color enters the kidney, so black pepper has a stronger effect on warming the spleen and kidney.
Chinese herbs are recommended to be used under the guidance of a physician, do not apply on your own to avoid damage to the body.