Charles Darwin's illness

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While onboard the ship, Darwin suffered from seasickness. In October 1833 he caught a fever in Argentina, and in July 1834, while returning from the Andes down to Valparaíso, he fell ill and spent a month in bed. From 1837 onwards Darwin was repeatedly incapacitated with episodes of stomach pains, vomiting, severe boils, palpitations, trembling and other symptoms. These symptoms particularly affected him at times of stress, such as when attending meetings or dealing with controversy over his theory. By March 28, 1849, Darwin felt that he was dying:

"I was not able to do anything one day out of three, & was altogether too dispirited to write to you or to do anything but what I was compelled. I thought I was rapidly going the way of all flesh."

Darwin diagnosed his own condition as "nervous dyspepsia" and on the advice of a cousin, he traveled with his family over 100 miles to the clinic and “water-cure” spa of Dr James Manby Gully at Malvern on March 10, 1849. Dr Gully had written a popular book called The Water Cure in Chronic Disease and identified himself as a homeopathic physician. Darwin was skeptical of homeopathy, and on March 19 he wrote:

“I grieve to say that Dr Gully gives me homeopathic medicines three times a day, which I take obediently without an atom of faith.”

Just eight days after arriving at Malvern, Darwin experienced a skin eruption all over his legs. After two weeks of treatment, Darwin wrote "I much like and think highly of Dr Gully." On March 28, he had not have any vomiting for 10 days (a rare experience for him). On April 19 Darwin wrote:

“I now increase in weight, have escaped sickness for 30 days, which is thrice as long an interval, as I have had for last year; & yesterday in 4 walks I managed seven miles! I am turning into a mere walking and eating machine.”

Darwin stayed at the clinic for four months. Shortly after returning home, he re-experienced his nausea, and he continued to experience digestive problems throughout his life, though he no longer experienced many of his other symptoms which he had experienced for two to twelve years (fainting spells, spots before his eyes, severe fatigue, and extensive boils) and was able to resume working. When Darwin's daughter Annie had persistent indigestion he took her to Gully's clinic on 24 March 1851. Gully repeatedly reassured them that she was recovering, but Annie died on 23 April. Darwin never returned to Malvern, but found another hydrotherapist, Dr Edward Wickstead Lane. Darwin's condition then was much as when he had first seen Gully, and Dr Lane later wrote

"I cannot recall any [case] where the pain was as poignant as his. When the worst attacks were on, he seemed crushed with agony."

The cause of Darwin's illness was unknown during his lifetime. Recent speculation has suggested he caught Chagas disease from insect bites in South America.