Toni Bernhard has written extensively on chronic illness and pain and learning how to live with them with more grace and ease. The Buddha’s teachings on dukkha (suffering and discontent) have been an important part of her practice. She wrote an introduction to the three kinds of dukkha that is helpful in understanding the basic problem. You can find her article here: Three Kinds of Dukkha Eplained
Mark Van Buren provides a good summary of the difficulties we may face in life as described by the Buddha’s teachings on dukkha. He also talks about the way in which shared pain can help open us to compassion. You can find his article here : Understanding Dukkha