Chinese Medicine regards Damp as being like a soggy/muddy field. The sort of place that would be the perfect place to grow rice. In this country the moors are a similar environment. Heather grows and the moorlands and it suits grouse. One place I visit regularly that brings this to easily to mind is Derwent Edge in the Peak District (see pictures above).
Damp is characteristically sticky and difficult to get rid of. It is heavy and it slows thing down. It tends to settle in the lower parts of the body. It can refer to damp weather. Dampness can refer to living conditions, . such as a moldy bathroom or living on a canal boat or close to a river. Other factors that can cause damp include wearing damp clothes, sitting or working in damp conditions.