horse chestnut. n. 1. Any of several trees of the genus Aesculus, especially the European species A. hippocastanum, having opposite, palmately compound leaves, erect clusters of white flowers tinged with red or yellow, and spiny or smooth capsules containing large shiny brown seeds.
Painful erections are very uncommon unless you have recently experienced penile trauma or irritation. Other causes of erectile pain would include: 1  Peyronie's disease. 2  Penile mass. 3  Priapism. 4  Phimosis. 5  Penile Injury.
In this Article. In this Article. In this Article. Men need a lot of different body parts working the right way -- from the brain and glands that control hormones to blood vessels and the penis -- to get and keep an erection. Because of that, erectile dysfunction, or ED, can have a lot of causes. Some of them are physical; others are mental and emotional. Physical reasons for ED range from heart disease and diabetes to high blood pressure and obesity. Damage to your nerves or arteries can cause problems with erections, too.