Before 1 year i had syphillis that time i get...

does syphlis test stay positive after treatment ?
you may have been mistaken , syphilis antibodies wil be positive after treatment , and those antibodies are a sign of cure of that infection , but the test for the syphilis bodies it self will be negative 
can you be infected by syphilis again ?
yes you can if you dont pay attention to your sexual safety 
signs and symptoms of syphilis :
1. skin rash
2. weight loss 
3. hair loss 
4. joint pain 
5. general weakness 
6. fever 
7. skin abnormalties in private areas 
general advices :
2. avoid multi-partners sexual relationships , and use condom and safe sex tools always 
3. if the symptoms presist or any STD infections appeared , visit dermatologist as soon as possible to do the needed medical examnations and dertmine the treatment pathway if needed