Yes, Psorolin-B Ointment can be used for underfoot psoriasis as long as the skin is not cracked, bleeding, or infected. Its natural ingredients, Wrightia tinctoria, Cynodon dactylon, Boswellia serrata, and Hydnocarpus laurifolia, work together to reduce inflammation, soothe irritation, and prevent infections, making it effective for treating psoriasis on the feet. Apply it to clean, dry skin, and follow the recommended usage or consult a doctor if the condition is severe.