There are certian things that can trigger Psoriasis to come back even after medication. Sometimes when Psoriasis comes back the medication and treatment might not be the same as what it was before.

Reasons why Psoriasis comes back:

- Weather change can cause Psoriasis to come back. 
- beta blockers
- Stress and unexpected change can cause Psoriasis.
- Infection such as strepthroat might cause Psoriasis.
- Smoking is bad for your system in many ways and it is another risk factor for Psoriasis.
- Drinking a lot of alcohol can cause Psoriasis.
- hand lotions
- face creams
- hairspray

Psoriasis can also come back for no reason. Even if your medication worked for a short time it does not mean that it has healed Psoriasis for life. When you start getting it back you should contact your doctor and continue treatment once again. Make sure that you watch after your diet and stay away from things that could possibly trigger Psoriasis.