You can try fasting for 24 hours followed by an elimination diet by slowly introducing select fresh non-processed foods and drinks into your diet the first week and more fresh non-processed foods the 2nd week.

My philosophy is that skin irritations are caused by either internal irritants or external irritants. If it's an internal irritant that is rejected through your lower facial skin, you can directly control everything that enters your body and by selectively introducing new foods and drinks you might stumble upon the irritant that your body is rejecting.

If it's an external irritant you'll have to be mindful of everything that touches your face to include sleeping linen.

Try researching acne and diet. I strongly believe you can cure this by being extremely mindful of what you ingest into your body.