What may be a cause of root gravitropism?

Tropism is the growth response of a plant caused by a stimulus.gravitropism is the growth response of a plant to gravity.the roots grow downward towards gravity.which is called positive gravitropism.the stem and upper part of a plant grow upward,away from gravity,which is called negative gravitropism

They might be white heads, basically pimples but you should ask your parents to check them out before it’s something bad.