The good news is that constant vomiting after eating is not usually a sign of sepsis or complications from a foot ulcer (though the failure to heal and relative numbness compared to the size of the wound
most certainly are).
The bad news is that vomiting after eating (especially over a long period of time, Lou has been complaining about this for weeks) is a common sign of advanced, untreated Type 2 diabetes. The nerve damage from 'beetus (autonomic neuropathy) causes gastroparesis, a slowing down of food going through the gut due to the nerves not being able to signal to the gastric muscles properly. That makes food get jammed in the gut, and combined with the likely blood sugar spike after eating and resulting uncontrolled hyperglycaemia in 400lbs of fat manchild, up comes dinner.
My guess is that Lou will learn this, and suddenly deny that the vomiting was ever a problem, it's healed now, stop concern trolling you haters! Then he'll get yet another symptom to complain about and fish for pity, only to go into his usual frenzy of denial when he learns it's probably due to diabetes and the cycle will repeat again