Hi, For your 4-year-old child, it s best to use gentle, fragrance-free products that are formulated for sensitive skin. Look for baby shampoos and soaps that are free of harsh chemicals and irritants. Some good options include: - Cetaphil Baby Wash and Shampoo - Aveeno Baby Wash and Shampoo - Mustela Gentle Cleansing Gel For hair oil, you can try coconut oil or sweet almond oil, as they are both gentle and moisturizing. As for your warts, there are a few different treatment options available, including over-the-counter remedies and medical procedures. Over-the-counter remedies for warts include salicylic acid and cryotherapy (freezing the wart with liquid nitrogen). These products are found at most drugstores. If over-the-counter remedies aren t effective, your healthcare provider may recommend medical procedures such as electrocautery, laser therapy, or surgical removal. To help reduce the appearance of the black marks left after removing warts, you can try using a scar treatment cream or gel. Some good options include: - Mederma Advanced Scar Gel - ScarAway Silicone Scar Sheets - Bio-Oil Skincare Oil It s important to note that scar treatment products can take several weeks or even months to show results, so it s important to be patient and consistent with use. Additionally, it s important to protect your skin from the sun, as exposure to UV rays can make scars more noticeable. Wear sunscreen and protective clothing while outdoors. If you require a personalized response, kindly use the Ask A Doctor service and post a follow-up. Take care. Hope I have answered your question. Regards, Dr. Priyanka, General & Family Physician