There are tons of people who will try and make you THINK they have something which will make your penis bigger; but it just isn't so.
Over the years I have tried many things on my Jock area in order to get rid of a consistent problem. After one has used all the antifungal creams, the thing will be resistant against what are called 'Azoles' (Clortrimazole, Mitronidazole, Fluconazole, Itradazole, etc). Try using one of the antifugal creams which aren't an azole such as Terbinafine, Tinactin, etc. If those fail, try and convince your dermitoligist to prescribe Naftin (also called Naftine). It tends to go for $700 a tube, so make sure you get a prior authorization from your insurance first). I, also, got a tube for $10 on-line one time, guess they didn't know how much it is worth). And, you can sometimes find it for $400 a tube on-line. Because the body has never seen it before, just a little dab done two times per-day tends to make any jock itch go away (it kills candidas including glabrata, and most bacterias including both gram + and gram - bacterias). Next, if you are going to use Tea Tree oil at all on your penis or balls, always only use three drops to about 3 tablespoons of pure coconut oil (which has Caprylic Acid in it which kills candida). Add three drops of peppermint oil to the carrier oil and a couple of clove oil, both of which kill Candida. Apple Cider Vinegar bath mixed 50/50 with distilled water. Put it on your balls and penis twice per-day. I keep it on about 5 minutes, then wash it off, dry with hair drier. Over time, it will back-off. NEVER put pure tea tree oil on your balls or penis.