My friend has had bite-like marks on his arm and in between his finger. Sometimes a random bump pops up as well, and it may become red. It's been a week since they've appeared and the other day he woke up in the middle of the night and vomited. Yesterday he picked up a lemon and dropped it 3 times trying to squeeze it. Today - a week later he feels weak, no energy, says he has the symptoms of a migraine but not pounding (?).