The patient had a mild to moderate crushing injury to a fingernail, such as being caught in a closing drawer or being struck by a heavy object. The pain was initially intense but rapidly subsided over the first few minutes to 0.5 hour. Usually, by the time the patient is examined, there is only mild pain and tenderness. There is a light brown or blue-brown discoloration beneath the nail (Fig. 155.1). The patient may be concerned about the need to have the blood drained.