What are the complication of syphilis?

Heart disease
Nervous system disorders
Mental disorders
Blindness
Aortic aneurysms
Pregnancy Complications
If you have syphilis and are pregnant, you can pass it on to your unborn child. You might also have a higher risk of miscarriage, stillbirth (your baby being born dead), or your newborn dying within a few days.
Untreated babies who are born with syphilis can also have problems with their bones, blood, liver, spleen, brain, and skin. It may also cause blindness, seizures, developmental delays, and deafness.
Increased HIV risk
If you have syphilis, you’re up to 5 times more likely to get HIV. That’s because syphilis sores can be open, making it easy for HIV to get into your body while you’re having sex.
Gummas
These are small bumps of dead tissue and fiber. They can form throughout your body if you don’t get treated. You can get them in your internal organs and on bones or skin in the late stages. They typically go away with treatment.
Neurological Problems
If it’s not treated, syphilis can cause problems with your nervous system. Symptoms include:
Severe headache
Stroke
Loss of muscle coordination
Paralysis or inability to move part of your body
Numbness
A mental disorder called dementia
Blindness or changes to vision