From 1842 onwards, Chopin showed signs of serious illness. After a solo recital in Paris on 21 February 1842, he wrote to Grzymała: "I have to lie in bed all day long, my mouth and tonsils are aching so much." He was forced by illness to decline a written invitation from Alkan to participate in a repeat performance of the Beethoven Seventh Symphony arrangement at Erard's on 1 March 1843. Late in 1844, Charles Hallé visited Chopin and found him "hardly able to move, bent like a half-opened penknife and evidently in great pain", although his spirits returned when he started to play the piano for his visitor. Chopin's health continued to deteriorate, particularly from this time onwards. Modern research suggests that apart from any other illnesses, he may also have suffered from temporal lobe epilepsy.
In which year did Chopin begin experiencing a serious decline in health? To whom did Chopin write a letter on 21 February 1842 about his agonizing pain? What performance was Chopin forced to decline due to his increasing ill health? What instrument did Chopin play for Charles Hallé when the latter visited him? What has current day research suggested that Chopin was suffering from alongside his other illnesses? Starting in what year did Chopin start showing evidence of very bad health? What second performance did Chopin have to decline to play? What specific illness does modern evidence point to Chopin having? When did Chopin show signs of serious illness? Chopin wrote in 1842 that he had to lie in bed all day because what ached so much? Chopin had to decline who's invitation in 1843 to particpate in a performance at Erard's? Who visited Chopin in 1844 and wrote about his inability to move? Modern medicine indicates Chopin may have suffered from what condition?