Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it seems that along with chapped lips if you have the problem of the redness, itching and irritation around the lips, it seems to be due to Perioral Dermatitis.. Swelling of the lips along with itching and numbness can however be due to allergic reaction leading to Allergic Angioedema.. Perioral Dermatitis can be caused due to disturbances in microbial flora over the skin, bacterial infection,nasal and topical steroids, flouridated toothpastes, harsh chemical cosmetics, poor facial hygiene, hormonal imbalances etc.. I would suggest you to consult a Dermatologist and get evaluated and he can do a thorough clinical evaluation and advise you to apply topically ointments containing Doxycycline, Metronidazole.. You can also be advised oral intake of erythromycin.. Ointments containing Azaelic acid,Pimecrolimus etc can help.. Avoid any skin cosmetic or steroid ointments.. Avoid excess sun exposure, use gel based sunscreen lotion.. You can take anti allergics like Levocetrizine to reduce swelling and itching of the lips.. Do cool compresses over the lips.. Drink plenty of water.. Avoid any chemical lip cosmetic.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.