Basically all drugs have a certain degree of inadequate toxicity, so we have always emphasized that vaccination for dogs should be carried out in a healthy state. Of course, we should also note that individual differences in dogs and the methods when injecting vaccines may lead to certain adverse phenomena in dogs.
For example, after the dog is vaccinated, the spirit will appear a little bad. This is a normal phenomenon and will generally improve in a few days. In addition, some dogs will have other related problems after vaccination.
Generally, a bag will appear after the vaccine is injected into the dog due to inaccurate injection of the injection. However, this problem is not a big deal. We can use a hair dryer to blow around the bag for a while, or apply a warm towel on the bag to accelerate the absorption of drugs. After a period of time, the bag will slowly disappear.
Generally, the probability of such a situation is relatively low, because most of this is caused by not doing a good job of disinfection before injection. However, usually injecting in the hospital, doctors will rub the area where they need to be injected with an alcohol cotton ball before injection. So this situation mostly happens to the owner who is vaccinating the dog.
Some dogs will experience local hair loss after vaccination. This may be because the needle pierces the blood vessels during injection, causing embolism. The long-term lack of blood supply to the hair follicles will lead to hair loss in this area.
Some dogs will not have any adverse reactions after being vaccinated, but some dogs with systemic deviations will experience poor spirits and poor appetite. This phenomenon is generally normal. After all, the vaccine itself is a virus, which will more or less have a certain impact on the dog's body. However, this phenomenon will generally improve after 2-3 days. If the dog looks listless for several days, it is best to take the dog to the hospital for a check-up.