I had them stung myself (it was rather common among poorer kids in the 90ies), went well with the ears, but not so good at the belly. As mentioned, at the beginning its importat to wear rather small earrings, that are additionally gold/silver or medical/stainless steel. When that has fully healed (about 6 weeks) you should be able to rub your earlaps without problems, and be able to feel a small hardened "channel" in your ears. (The body is starting to built up skin along the medical earring.) Dont do experiments in the beginning, so no to heavy earrings, as well as no stuff like small chains that get plugged through the earhole or whatever. I´d recommend not to wear long (can get stuck and when you move your head you pull on your earhole accidently) or heavy earrings, until about 6 months, so you can be absolutely sure, that the still fresh and softer hole, does not widen itself. But normal earrings like hangers with a pearl or whatever, should ne no prob after a few weeks.
About any itching, normally its simply hurts a bit the hours afterwards. On the next day, it normally only hurted, when I touched or moved it. I only had one time troubles with itching, and that was when my belly piercing got infected, so when you do it at a professional pierding studio or doctor, there should be no itching.
If it helps you: If you feel whyever really uncomfortable with it, so that you cant stand it: If you remove the medical earring, the fresh hole will normally grow together again immediately within a few days.