Are There Any Adverse Reactions To Microchipping Your Pet. The chip moves from its injected area or has fallen out. Most adverse reactions involve a nodule (growth or lump of abnormal tissue) appearing under the skin where the microchip was implanted.
More severe side effects have been associated with the improper placement of a microchip. Some areas mandate microchipping by law. Migration of a microchip from the implant site, or expulsion of a microchip from the animal's body can generally be attributed to implantation technique, such as the microchip not being inserted.