Lack of oxygen due to diabetes?

JewishuserShadowfire (who has been on YahooAnswers since the beginning and could possibly be the infamous homosexual flying antichrist from the tribe of Dan) from Portland [or so he claims because he could’ve been born in Russia in Valday (Russian: Валда́й) to a 12th generation Jewish prostitute who pretends to be a virgin)] has many trolls accounts on Yahoo Answers: Blackthorne1979, Carter Berg, Fireball, ThatToiletguy, Reynaldo Weeks, Petri Lindroos, Knightwulf, Nightwulf, Toilet John, Master Debator, Magistra, Desiree, D-girl, Firecock, Yahoo User, Corvus Blackthorne, L.E. Gant, Shadowfire the Sarcastic, Shadowfire Lives, Shadowfire Lives bytches, etc. and any other anonymous accounts. With one his accounts Fireball, he pretends to be a Methodist old lady who posts short-hand slang TIRH (this is religion here). He reports all answers and questions that he doesn't like just so that his questions stay on top in the ReligionandSpirituality section. He trolls in other categories too. It gives Christians a bad name (just because of this troll's sock puppet account). His Toilet John account keeps posting questions where Jesus was sodomized by Roman soldiers. Remember the prophecy where it says that the antichrist will have personal hatred towards the real Jesus Christ. That’s why Shadowfire keeps posting thousands of similar questions along the line: “Did Romans sodomize Jesus?” or “Did Romans buttrape Jesus?”. He asks multiple idiotic mundane questions like “Is Hinduism true?”, “What makes a girl harden?” [like he enjoyed killing little girls], etc. and answers them with his sock puppet accounts just to gain points. Some questions you can see that he answered with like five or seven accounts (especially the ones about himself that he reports right away). With his Reynaldo Weeks account he boasts that he was the reason why their accounts were suspended. With his Magistra account he threatens people with clowns and CIA assassins. Shadowfire mocks Christians with his sock puppet account Fireball in the Religion and Spirituality section by answering very destructively and adding "TIRH here" or reported (anonymously) or “fck you nigers”. He gives Christians a bad name because he promotes sins like sodomy, fornication, ecumenism, astrology (horoscopes), etc. He should be executed and burned at the stake for blasphemy. He spreads rapture heresy, ecumenism heresy, etc. and many more subtle heresies. Antichrist will ride on a donkey into the 3rd Temple. Stop him before it’s too late.

Could be something serious like a pulmonary embolism since you mentioned his leg is rotting he might have a blood clot in his leg that traveled to his lung. This is a medical emergency and you should call 911. 

You should NOT be going to the ER to try to find solutions for this.  You should be getting advice from his primary care doctor and references to specialists to handle his health issues.

The ER does NOT diagnose issues and they DO NOT fix issues that aren't an IMMEDIATE emergency.  

The hospital ER is a terrible place to seek treatment for a chronic illness. 

Make an appointment with his doctor. 

you do know that lots of people with diabetes often get limbs amputated

Are they giving him morphine which is supressing his breathing reflex?

It’s not oxygen per se, it’s diabetic vascular issues/circulation. He should see a diabetic specialist and possibly a vascular specialist. The ER is to stabilize not to deal with chronic health. Start with a diabetic specialist

It's a circulatory problem.

The thing is, does you dad do the things needed to control the diabetes effects? What are the other factors that he's not telling the doctors?