I have to agree with Sadiej a bit. He just had his toe amputated. Not only is that painful, but OMG he lost a part of his body! A rather important part too, a toe may seem meaningless, until you have Vertigo or various balance disorders ( I do ) you might suddenly realize how important your big toe is when you don't want to fall over for no apparent reason.

Not only is he healing physically, it will take him emotional time to get over the loss of a part of himself. No matter how trivial the part may seem, it's a loss. He will be worried over many things.

Try thinking of his feelings, and worry less about your own. Yes, it sucks when you are perfectly healthy and want to have sex and be Dominated. But, I find that it's almost impossible to get horny at all when my Master isn't feeling well. I can go from dripping to motherly in seconds. My life belongs to him, where would I be without him? His health and happiness mean everything to me.

Submission isn't always about sex. Try being a servant to him. Bring him his medication, drinks, snacks. Cook him the food he likes. Read to him, watch his favorite movie, play a board game. What will make HIM feel better?