The hardness may be due to dryness of skin Soak the affected area in lukewarm water for 20 to 25 minutes then dry it with clean cotton cloth You can use paraffin plain petroleum jelly

It can be because of eczema or dermatitis or fungal infection or allergy or psoriasis or dry skin etc. I need details n preferably pics of affected area. In the meanwhile do this • Moisturize frequently. • Avoid sudden changes in temperature or humidity. • Avoid sweating or overheating. • Reduce stress. • Avoid scratchy materials, such as wool. • Avoid harsh soaps, detergents, and solvents. • Be aware of any foods that may cause an outbreak and avoid those foods. For this homeopathic treatment is very effective For more details u can consult me.

Need more information.. pls send a picture.