Miasmal was formed in 2007, in Gothenburg, Sweden. In spring 2008, a 4 track demo was recorded by the band. This demo was released by Detest Records in 2008, and was also released as a limited 12" vinyl in 2009 as a co-release between Detest Records and Nuclear War Now. A few months later an additional 100 copies were pressed as an picture disc edition. All formats are now sold out.

In 2010 a 2-song 7" EP was released on Detest and Me Saco Un Ojo.

Miasmal made their live debut in September 2010 at the Kill-Town Festival in Copenhagen, Denmark.

April 2011 saw the release of Miasmal's first full-length album. This 8-song assault wasreleased on vinyl by Detest / Me Saco Un Ojo, and on CD by Dark Descent Records. The CD contain the demo and 7" as bonus tracks.

May/June saw Miasmal tour the US and make appearances on Maryland Death Fest and Chaos in Tejas. Björn stood in for then drummer Micael for the tour. After the tour, Björn became the permanent drummer for Miasmal.