Leaf spot first appears in rainy or humid weather as the plants are growing. They look like small brown spots with a water-soaked margin surrounded by a yellow halo usually on the upper halves of the iris leaves.
Two, caffeine enhances the sensation and contractility of the bladder. Another way caffeine can affect prostate health is through its ability to irritate the bladder because it is a theoxanthine, a family of drugs that includes theobromine (found in chocolate) and theophylline (found in tea). Theophylline also stimulates and irritates the bladder.
Diuretic Effects. Caffeine is classified as a diuretic, which means that it increases urine output. The primary reason why urine increases urination is that it increases golmerular blood pressure, or blood pressure within capillaries in kidneys. This, in turn, increases blood filtration, resulting in an increase in urine.