The correct term is transgender, not shemale.
It sounds like you are experiencing canker sores or cold sores - not syphilis. Syphilis sores don't recur like this. If they are on the outside of your lip, it's more likely to be a cold sore (hsv1), and if it's inside your lip, it's likely to be canker sores, which are super common.
Syphilis isn't transmitted by a handjob, either. No STD is.
If it's hard to take a warm shower, then maybe just wash yourself with warm water at the sink. I don't look at pics - I'm not a doctor and can't diagnose - but google balanitis and see if that fits. You should get new symptoms checked out by a doctor.
If you've ever had sex - oral sex or genital to genital sex (vaginal or anal), and are concerned about syphilis, it's easy to find out if you have it with a simple blood test. If all you've ever done is a handjob, you don't need to worry about STDs.