Angular Cheilitis is also known as angular stomatitis, you can treat it very fast by using method explained in the video.
It is most commonly seen in those persons who are in habit of drinking tea after taking meal, in these candidates, dietary iron is not absorbed due to tea or coffee, so leads to iron deficiency anemia, along with this when vitamin B complex deficiency is there, and 3 rd cause is yeast infection. Yeast grow in dark and moisture.
So the angle of lips are the best place to it, because there sunlight do not reach and from mouth it obtains its moisture. Many people think it to be due to dryness, but the fact is moisture is the cause, these people keeps on licking it with tongue, giving it more chance to proliferate.