Depending on the cause, leg pain can occur in one leg only or in both legs. Typically, the leg pain is a result of tissue inflammation that is caused by injury or disease. Either injury or chronic disease can cause inflammation to any of the tissues of the leg and lead to leg pain.
The repeated d in the first measure is the pedal point. Play (helpÂ·info) In tonal music, a pedal point (also pedal tone, pedal note, organ point, or pedal) is a sustained tone, typically in the bass, during which at least one foreign, i.e., dissonant harmony is sounded in the other parts.
The 'una corda' is notation for the soft pedal. The soft pedal is common in post-Classical works, such as compositions by Beethoven or Chopin. Its melodramatic tone enhances soft passages, but it is important to know the difference between playing with the dynamic marking piano and with the soft pedal.