Source for the Mitzvah of visiting the sick: Nedarim 39b; Bava Metzia 30b Isaiah visiting Chizkiyahu: Berachot 10a
One who visits will pray for the sick person, resulting in his eventual recuperation: Nedarim 40a
How often one ought to visit: Nedarim 39b
Where the visitor should sit: Nedarim 40a
Visiting one who is feverish: Nedarim 41a
Visiting one who has a bowel disorder: Nedarim 41a
Visiting one who has an eye disease: Nedarim 41a
Visiting one who has a head illness: Nedarim 41a
Visiting one with "Bordam," a disease which causes either massive dehydration or massive hemorraging, depending on the interpretation: Nedarim 41b
One ought not to visit in the morning, when the morning strength of the ill person will fool him into not praying, nor in the evening, when the evening strength of the illness will fool him into giving up hope: Nedarim 40a
Visiting one who will be embarrassed by having a visitor: Nedarim 41a
Visiting one's "inferior": Nedarim 39b
Visiting one who has vowed not to benefit from him, or the vower visiting the person from whom he has vowed benefit: Nedarim 38b-39b Covering one's head when visiting the sick: Nedarim 40a
A custom of paying people to come stand/sit by the sick person: Nedarim 39a
The Power of Visiting the Sick
Removing some of the illness/pain by visiting, where one is a "Ben Gil" of the sick person: Nedarim 39b
What someone is doing to an ill person, if he _does not_ visit him: Nedarim 40a
Gd visits the sick; so should we: Sotah 14a
The Reward
The reward is in this world and in Olam HaBa [World to Come]: Shabbat 127a
The reward which is in this world: Nedarim 40a
The reward is limitless: Nedarim 39b
One who visits a sick person is saved from the Judgment of Hell: Nedarim 40a
