Hi,
Are there other symptoms present? If you do not have a history of allergies, this could be an
infection,
eczema or dermatitis. Eczema or inflammation of the epidermis may present with dryness, redness, flaking, blistering, cracking, or bleeding. However, since the symptoms have been there for 3 weeks, I recommend that you have this evaluated further by your dermatologist for proper management. Direct clinical examination is important for proper diagnosis.