For infantile eczema, there is currently no single medication or bathing method that can guarantee the "fastest and most effective" treatment. However, with proper care and medication, symptoms can be effectively relieved. It is generally recommended to use a combination of gentle cleansing and topical medications under the guidance of a doctor.

1. Bathing as a supplementary skincare routine: Take a short bath in warm water, adding a small amount of non-irritating bath products. After bathing, gently pat your skin dry and immediately apply moisturizer to help retain moisture.

2. Commonly Used Medications: Depending on the severity of the eczema, doctors may recommend topical steroid creams or non-steroidal creams. These medications can reduce redness and itching, and should be used as prescribed; avoid adjusting the dosage on your own.
3. Daily care: Choose loose-fitting cotton clothing and avoid overheated environments; if the child scratches due to itching, trim their nails and try to distract them.
Eczema care requires patience, and each child's situation may differ. If the skin breaks down, becomes infected, or does not improve over a long period, please seek medical attention promptly for a professional evaluation and adjustment of the treatment plan.