This will help its mental state, as well as keeping its blood pressure down and thus limiting the amount of bleeding. [substeps] However, do not give it any medication to keep it calm unless you discuss that option with a veterinarian before you do.
[header] How to treat a dog sneezing blood [title] Keep your dog calm. [step] If your dog is actively bleeding it may be upset or agitated by that. Focus on keeping the dog calm by petting it and reassuring it if you can.