During this period, Crevel wrote novels such as Mon corps et moi ("My Body and Me"). In 1926, he was diagnosed with tuberculosis which made him start using morphine. The 1929 exile of Léon Trotsky persuaded him to rejoin the surrealists. Remaining faithful to André Breton, he struggled to bring communists and surrealists closer together. Much of Crevel's work deals with his inner turmoil at being bisexual.
Crevel killed himself by turning on the gas on his kitchen stove the night of June 18, 1935, several weeks before his 35th birthday. There were at least two direct reasons: (1) There was a conflict between Breton and Ilya Ehrenburg during the first "International Congress of Writers for the Defense of Culture" which opened in Paris in June 1935. Breton, who like all fellow surrealists, had been insulted by Ehrenburg in a pamphlet which said – among other things – that surrealists were pederasts, slapped Ehrenburg several times on the street, which led to surrealists being expelled from the Congress. Crevel, who according to Salvador Dalí, was "the only serious communist among surrealists" (and was facing more and more solitude as the real face of Soviet socialism started to occur ), spent a whole day trying to persuade the other delegates to allow surrealists back, but he was not successful and left the Congress at 11pm, totally exhausted. (2) Crevel reportedly had learned that he suffered from renal tuberculosis right upon leaving the Congress (Claude Courtot, in ). He left a note which read "Please cremate my body. Loathing."
It should be remembered that when André Breton included the question "Suicide: Is It a Solution?" in the first issue of La Révolution surréaliste in 1925, Crevel was one of those who answered "Yes". He wrote "It is most probably the most correct and most ultimate solution."