YouTuber Twomad passed away back in February … and, now TMZ has learned his exact cause of death — an accidental morphine overdose.

TMZ has obtained the County of Los Angeles Medical Examiner’s report … and, they say Twomad — real name Muudea Sedik — died from morphine toxicity.

Mitragynine — another drug commonly used to treat opioid withdrawal — also contributed to his death, according to the M.E.

We broke the story … police discovered Twomad dead at his Los Angeles-area home after cops say his therapist called them to conduct a welfare check.

Law enforcement sources told us they were looking into the death as a possible O.D. ’cause they found drug paraphernalia at the scene. Now, they’ve confirmed drugs as the culprit.

The influencer tweeted several concerning pics in the lead-up to his death … including images of multiple guns.

Twomad was a controversial influencer known for posting skits, commentary and other stranger videos to his profiles.

He made waves for collaborating with OnlyFans star Belle Delphine back in the day … posting sexual shots in “Toy Story” costumes. Twomad was 23.