I could not find scientific evidence in support of black pepper as possessing inflammatory properties. It is though true that black pepper oil may irritate sensitive skin. Its excessive use can overstimulate the kidneys.
Based on modern cell, animal, and human studies, piperine has been found to have immunomodulatory, anti‐oxidant, anti‐asthmatic, anti‐carcinogenic, anti‐inflammatory, anti‐ulcer, and anti‐amoebic properties. (Meghwal, M., et al., 2013)
Pepper enhances the flow of oxygen to the brain, improves digestion and circulation, and stimulates the appetite. It excites the salivary and the sweat glands, besides killing intestinal worms. It helps propel the downward movement of the abdominal wind.
Ayurvedic medicine with black pepper as an ingredient is said to treat a range of diseases like cholera, toothache, dysentery, and conditions of the respiratory and digestive systems. Pepper increases the flow of saliva, stimulates appetite, encourages peristalsis, and tones the colon muscles. These are properties typical to most spices.
In India, a decoction of black pepper powder, ginger, and sugar is a common home remedy for cough and cold. Tea infused with black pepper and ginger helps reduce discomfort from the common cold.
To know about herbs, properties, and natural solutions to various diseases, you can check this book selection.