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.
Erectile dysfunction (ED)/impotence is defined as the inability to achieve and maintain an erection that is satisfactory for the completion of sexual activity. In general, the cause of erectile dysfunction is divided into two types. Many men will have both. psychological (mental) causes and. physical or organic (having to do with a bodily organ or an organ system) causes.