Some supplementary folk remedies can be tried to treat psoriasis, but it's important to note that these methods cannot replace regular medical treatment. It is recommended to consult a doctor before using any of these methods and to combine them with proper medical treatment.

1. Topical Relief: Some patients use gentle, natural topical ingredients, such as oatmeal baths or aloe vera gel, which may help soothe dry and itchy skin. A small patch test should be performed first to avoid irritation.

2. Dietary adjustments: Maintaining a balanced diet and appropriately increasing the intake of foods rich in Omega-3 (such as deep-sea fish) may have a supplementary effect in reducing inflammation. However, dietary changes need to be maintained long-term, and the effects vary from person to person.
3. Lifestyle habits: Regular sleep patterns, reduced stress, and avoidance of skin damage can help control fluctuations in the condition. For example, relaxing through light exercise or meditation.
In general, folk remedies can supplement daily care, but the key is still to follow a professional doctor's treatment plan. If you are considering trying any folk remedies, please be sure to consult with a doctor first to ensure they are safe and suitable for your individual circumstances.