Dream of spitting blood means misfortune o bad news from a distant part. However if you spit only a bit of it, things will get fixed sooner or later.

…Dreaming of spitting, denotes unhappy terminations of seemingly auspicious undertakings. For some one to spit on you, foretells disagreements and alienation of affections….

Richness. 177.

…Saliva or spittle in a dream represents the element of one’s strength. If in a dream one seems to have a dry mouth, it represent his inability to do what his competition can do. Spitting against a wall in a dream means spending one’s money in a good cause, or engaging in a profitable business. Spitting on the floor in a dream means purchasing land. Spitting against a tree in a dream means to recant one’s promise. Spitting at another person in a dream means despising him. Warm saliva in a dream means long life, while cold saliva represents a short life. The color of one’s saliva in a dream shows the state of one’s spirit. Spiting blood or phlegm in a dream means speaking ill of others….

(Imprecation | Witchcraft) Spitting over something in a dream, or blowing over a knot and spitting on it with an imprecation in a dream means witchcraft. (Also see Spittle)

…to you. To examine your teeth, warns you to be careful of your affairs, as enemies are lurking near you. If they appear decayed and snaggled, your business or health will suffer from intense strains. Dreaming of spitting out teeth, portends personal sickness, or sickness in your immediate family. Imperfect teeth is one of the worst dreams. It is full of mishaps for the dreamer. A loss of estates, failure of persons to carry out their plans and desires, bad health, depressed conditions of the nervous system for even healthy persons. For one tooth to fall out, foretells disagreeable news | if two, it denotes unhappy states that the dreamer will be plunged into from no carelessness on his part. If three fall out, sickness and accidents of a very serious nature will follow. Seeing all the teeth drop out, death and famine usually will prevail. If the teeth are…

…losing something. If you kill blue dragon, then you need to learn more in order to get knowledge. If dragon is attacking you, then there aren’t any chances to avoid something, what is represented by dragon’s colour. If red dragon attacks you – you may get very intimate offer. If someone is attacked by dragon is attacking with fire, then it is your action’s representation. Burning dragon is spitting fire on person, that you know and have feelings on her/him, so this dream represents your burning passion or burning anger for this person. If you’re touching a dragon, it represents your accommodation with particular condition. To touch grey dragon in the dream, means that you don’t have worries about not being able to choose something. If you see eating dragon, then it shows that condition is going bigger. To see green dragon eats grass in the dream means that you…

…Dreaming of having defective teeth from birth or crooked teeth is a bad dream because it insinuates that health and all of the dreamer’s affairs, business, interests and emotions go from bad to worse and will remain that way if they are not given immediate attention. Dreaming of spitting out your own teeth insinuates an imminent risk of disease, either your own or from a loved one. Dreaming of pulling out, extracting or losing a tooth and feeling the cavity with the tongue suggests that you are about to enter business matters that you won’t like. You will take them under consideration because they will seem promising, but eventually you’ll have to reject them. Teeth that are pulled by force always indicate all the dreamer’s unpleasant fears. To dream that by getting hit or by some other violent cause teeth are broken, it announces misfortunes and in some cases even…

If you dream that you are blind, misfortunes are near. Or of spitting blood, long illness you may fear.

If you spit in a dream, then such dream shows that there are some aspects of yourself you wish to get rid of. The spitting also shows the aggression that has been suspended.

To dream you vomit much blood, and of a good colour, is good for him that is poor, for he shall get store of money. It is also very good for him who have no children, and whose kindred are in a strange country: the first shall, see a child of his own; the other his kindred returning home. To dream of carrying blood, is not good for them that desire to be hidden, to dream you vomit corrupt blood, is sickness to all. To cast a little blood in spitting, foretells sedition, as some have known by experience.

…To dream about a spittoon, and worse if it’s dirty, suggests that you’re not properly managing your affairs, and that will make you have negative results in a short term. To dream that you’re spitting in a spittoon announces upcoming frustrations due to your misconduct or poor performance….