Diagnosis is based on bowel habits, symptoms, and medical history. Rome III, a set of criteria used to diagnose functional GI disorders, describes the diagnosis of chronic constipation as constipation for at least six months as well as specific symptoms for at least three months (eg, straining with at least 25% of bowel movements, details here).
Place the sugar cube in the bottom of an Old Fashioned glass and soak with 4-6 dashes (or drops) of Aromatic Bitters. Add a splash of water and muddle the sugar until it dissolves fully in the water and bitters. Only add enough water to dissolve the sugar. Add bitters and water to sugar.
The Old Fashioned is garnished with an orange peel, and this garnish is about as important as the onion or olive is in a martini. The orange peel infuses the Old Fashioned, so that by the time you get to the bottom of the drink, the cocktail has taken on a decidedly citrusy flavor. The Manhattan is a bit simpler in its garnish: a brandied cherry (which is sometimes found as an additional garnish on the Old Fashioned).