Though hair transplantation has no major side effects, yet there are a few ways in which our body reacts to the transplant.

Temporary thinning of permanent hair: within 2 to 3 weeks of the transplant, the transplanted hair will fall out. But this is completely natural and the re-growth starts immediately. Almost 60% of them grow back within the next 6 to 9 months
Pain: Pain is usually minimal and most patients do not require any medication. However, for the few who experience any kind of pain, regular medications are sufficient.

Itching: The scalp is tender after the transplant and some amount of itch is common but it usually lasts for not more than a week. Shampooing regularly can help contain it.

Mild swelling: There is rarely any swelling but some patients complain of mild swelling for the initial 1 or 2 days which subsides on its own.

Cysts: Though not more than 2 or 3 mm in size, some patients experience cyst development due to transplantation of several grafts at a single location. The cysts also like all other symptoms subside on their own within a few weeks only.