Ajin: Demi-Human is a Japanese manga series written and illustrated by Gamon Sakurai. It was adapted into an anime film trilogy by Polygon Pictures between November 2015 and September 2016. An anime television series adaptation also by Polygon Pictures aired between January and April 2016, with a second season premiering on October 8, 2016. A live-action film adaptation was released on September 30, 2017.
According to Banner Health, cellulitis and circulation problems, also known as venous insufficiency or venous hypertension, can cause the lower legs to turn red. Circulation problems lead to a variety of conditions that can make all or part of the lower legs turn red, according to the American Diabetes Association.
In general, red itchy bumps on your legs are not a cause for alarm. Most doctors have seen this type of rash before and know how to diagnose. You may feel the urge to scratch these bumps, but that is not advisable. You can open up the skin and cause an infection by over-scratching.