what is wrong with tiny tim in a christmas carol

In Charles Dickens's A Christmas Carol, Tiny Tim is a poor and sickly child who is often ridiculed and mistreated by his father and the other members of his family. Despite this, he remains a kind and gentle soul who is filled with hope and optimism, even in the face of adversity. He is a symbol of the Christmas spirit and the power of kindness and goodwill towards others.