The 44-year-old former 'Friends' star, who donned a strapless playsuit for the glitzy event, disguised the spots with some foundation, reported Daily Mirror.
Aniston has used the ancient Asian practise of cupping to stimulate circulation for over six years. However, the after effects have resulted in few red circular marks on her body.
Aniston's film is a compilation of short films which deal with the still stigmatised issue of mental health and has a stellar cast with names like Jennifer Hudson, Melissa Leo and Octavia Spencer, Sarah Hyland, Laura Dern, Brittany Snow, Melanie Griffith, Ashley Judd and Bryce Dallas Howard.