Once you find Doctor Smurf, he will need several items as part of a quest called “The Love Doctor”.
You will need to make these items at the Jewel Smelter. He will need a Tiara, a Crystal Bracelet and a Silver Ring.
Doctor Smurf will then move into his own hut, which is located in the Alchemy section of the village next to Alchemist and Brainy Smurf.
Doctor Smurf will come with his own set of quests and recipes when he opens his Medicine Shop, which we think will happen as part of the next update.
The items that Doctor Smurf will be asking you for will require Silver Chunks, Emerald and Crystal. So it is better to start stocking some of these resources before you reach his quest, as some items like Silver and Emerald are very rare in the village and their regrow time is quite long. Creating Crystal requires Fire Potion, so make sure you gather enough Phosphorus, as lack of it might delay your progress.
Credit to Nima S & Gio Rho