Shock loss is when the hair sheds in response to either direct physical trauma to the follicle or a physiological response to trauma in the nearby area. This can sometimes happen after a hair transplant surgery, and is more likely to occur when adding hair to an area of existing density or diffuse thinning.
If the hair is going to shed, it will do so soon after surgery. Occasionally the shock loss is permanent, but it usually grows back. The earliest that you can see the shocked hair begin to grow back is 3 months, and you can expect to see full regrowth at about 1 year.
I am not a doctor. I am a technical writer and surgical tech trained in hair transplant.
My opinions are not necessarily those of Drs. Cole, Mwamba or IHTI.
My advice is not medical advice.