Background: Sherman Joseph Alexie, Jr. (born October 7, 1966) is a Spokane-Coeur d'Alene-American novelist, short story writer, poet, and filmmaker. His writings draw on his experiences as an Indigenous American with ancestry from several tribes. He grew up on the Spokane Indian Reservation and now lives in Seattle, Washington. His best-known book is The Lone Ranger and Tonto Fistfight in Heaven (1993), a collection of short stories.
Context: Alexie was born on October 7, 1966, at Sacred Heart Hospital in Spokane, Washington. As a little child he lived on the Spokane Indian Reservation, located west of Spokane. His father, Sherman Joseph Alexie, was a member of the Coeur d'Alene tribe, and his mother, Lillian Agnes Cox, was of Colville, Choctaw, Spokane and European American ancestry. One of his paternal great-grandfathers was of Russian descent. Alexie was born with hydrocephalus, a condition that occurs when there is an abnormally large amount of cerebral fluid in the cranial cavity. He had to have brain surgery when he was six months old, and was at high risk of death or mental disabilities if he survived. Alexie's surgery was successful; he suffered no mental damage but had other side effects.  His parents were alcoholics though his mother was a sober alcoholic. His father often left the house on drinking binges for days at a time. To support her six children, Alexie's mother, Lillian, sewed quilts, worked as a clerk at the Wellpinit Trading Post and had some other jobs.  Alexie has described his life at the reservation school as challenging because he was constantly teased by other kids as well as endured abuse he described as "torture" from teachers who were white nuns. They called him "The Globe" because his head was larger than usual, due to the hydrocephalus as an infant. Until the age of seven, Alexie suffered from seizures and bedwetting; he had to take strong drugs to control them. Because of his health problems, he was excluded from many of the activities that are rites of passage for young Indian males. Alexie excelled academically, reading everything available, including auto repair manuals.
Question: Why was life at the reservation challenging to him?. Whats the answer?
he was constantly teased by other kids as well as endured abuse he described as "torture" from teachers who were white nuns.