You can pick up the Treating Symptoms side gig in Cyberpunk 2077 almost as soon as you finish the opening quests of the Phantom Liberty DLC. Once you leave Myers at the hideout during Lucretia my Reflection, you should get a call from Mr. Hands which will open up a number of sidequests and conveniently mark them on the map for you...
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How to complete Treating Symptoms in Cyberpunk 2077: Phantom Liberty
Source: PC Gamer (opens in a new tab)