What is the main conflict in A Worn Path by Eudora Welty?

In "A Worn Path," the woman's trek is spurred by the need to obtain medicine for her ill grandson. Along the way, Phoenix encounters several obstacles and the story becomes a quest for her to overcome the trials she faces, which mirror her plight in society at large. The story is one of the best examples of Welty's writing, which is known for its realistic portrayal of the American South, particularly during the depression.