My father-in-law is in hospital, and I'm worried. I don't know how to send text messages to comfort my husband.

You can send the following messages to comfort your husband:

"Dear, I know you may feel a lot of pressure now. Don't worry too much. Dad will be fine. He is being treated in the hospital now. The doctor will go all out and he will recover soon. No matter what happens, I will support and love you by your side. Remember to keep healthy and don't overwork. We should all pray for dad to recover soon. Love you. "

Such a short message can express your concern and support, and also remind him to pay attention to his health.