Can skin allergy with redness and itching heal on its own?
In general, if skin allergy symptoms such as redness and itching are severe, they may not resolve on their own; however, mild cases may self-resolve. It is recommended to seek medical attention promptly and receive treatment under a doctor's guidance. Specific analysis is as follows:

If the skin develops dense red papules and extensive patchy erythema accompanied by significant itching, the condition will not resolve spontaneously. Without treatment, the symptoms may worsen and cause serious skin damage. Patients should follow medical advice and take medications such as loratadine tablets, cetirizine hydrochloride oral solution, or promethazine hydrochloride tablets to help restore the skin to normal.
If the skin only shows scattered or localized areas of faint red patches with mild itching, the allergic reaction may resolve on its own after removing exposure to the allergen. However, patients should still maintain a light diet and practice proper skin cleansing and care to promote recovery.
During the recovery period, patients should avoid consuming foods that commonly trigger allergies, such as seafood and milk. Additionally, adequate rest is important, and strenuous physical activity should be avoided.