Hello and welcome to HCM
Yes it is possible to increase height through surgery by putting implant in both the legs. This procedure increase the height from 3-6 inches.
It is effective in increasing height but about side effects it varies from person to person and the post operative care. In every surgical procedure their are chances of infection and delayed healing. but it happens only in 5% of the cases.
Once the implant is placed in the leg and post operative wound was healed than in long term their are more or less no complication unless you get major injury
at the site of implant or leg.