Thanks for the query. First of all the diagnosis has to be confirmed by visiting a good Dermatologist. As you may be knowing medical therapy do not work for syringoma, and that is the reason you were subjected to this therapy. RF or any other mode of physically destroying should be fine and has to be done with precision. Syringoma can recur.
Next Steps
Your dermatologist will decide a treatment plan for you after a consultation.
Health Tips
Avoid self medications. Meet a Dermatologist.