Calcium deficiency may refer to:

Calcium deficiency, a plant disorder that can be caused by insufficient calcium in the growing medium, but is more frequently a product of low transpiration of the whole plant or more commonly the affected tissue
Hypocalcaemia, the presence of low serum calcium levels in the blood
"The bends" is a colloquialism for decompression sickness. The Bends may also refer to:

The Bends (album), a 1995 studio album by Radiohead
"The Bends" (song), a 1995 song by Radiohead
"The Bends", a song by Mr. Bungle from the 1995 album Disco Volante
"The Bends", a song by Earl Sweatshirt from the 2018 album Some Rap Songs

See also
Bends (film), a 2013 British film
All pages with titles containing The Bends
Bend (disambiguation)
Bending (disambiguation)