Here is a short prayer that you can use for someone who is sick:
Dear God,
We bring before you [name of person who is sick], who is in need of your healing touch. We ask that you surround them with your love and comfort, and that you grant them the strength and courage to face this illness.
We pray for your wisdom to be upon the doctors and medical professionals who are treating [name], and that they will have the knowledge and skills to properly care for them.
We trust in your healing power and ask that you restore [name’s] health and well-being. Please also give strength and peace to their family and loved ones during this difficult time.
In your holy name we pray, Amen.