Please choose the correct ending to complete the given sentence: Health: [header] How to do a kidney cleansing fast [title] Check with your doctor first. [step] Consult your doctor before starting a kidney cleansing fast. Depending on your current health conditions, it may not be safe.

Ending1: Don't be surprised if your doctor expresses some skepticism about the benefits of your fast. She will most likely recommend you just drink more fluids and improve your diet to achieve lasting kidney-health. Ending2: In particular, before beginning a kidney cleansing fast, you should, in order to determine if you should be doing this fast as one of the first steps. [title] Clean the skin gently with a warm compress to keep the area clean and healthy. Ending3: Keep the following in mind : [substeps] Do not strain the kidney. Try to do it over the course of your night. Ending4: You need to see a doctor if you have an undiagnosed medical condition that causes diarrhea, vomiting, chronic abdominal pain, and severe nausea. Further, you may experience bladder or kidney issues during a fast.

Answer format: ending1/ending2/ending3/ending4