To solve the problem of skin itching caused by yam, you need to prepare water, soap and sugar.

1. First, take out the soap and sugar as shown below.

2. Rub your hands with sugar as shown below.

3. Then wash your hands with clear water.

4. Then wash your hands with soap.

5. Then wash your hands with clean water.

6. Finally solved the problem of skin itching caused by yam.