An 8-year-old boy undergoing treatment to fight a rare skin disease has been kept out of his Christian school over his hairstyle.

Zion Williams, who attends the Shiloh Christian Academy in Philadelphia, suffers from Alopecia, a skin disease that causes hair to fall out, Fox 29 reports.

Williams has been getting shots at Drexel University to help the hair grow back, but the academy sent him home Wednesday for violating a school ban on long hair.

"I think it's heartless,” his mother, Talia Mann, told Fox 29. “It's heartless that he would actually take him out of school because of something so simple as a haircut."

The school rejected a doctor’s note calling for Zion to be exempt from the rule due to his medical condition.

However, Bishop Derrick Williams, who is the principal and pastor of the Shiloh Christian Academy, said Zion would be allowed back in school Tuesday.

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