<s>[INST] On Tuesday, I had abdominal pain which was, at times, severe. That ended last night. I didn t eat much of anything since breakfast on Tuesday and today I had breakfast and lunch. Around 1:30 I noticed that my lower lip was swelling on the left side and later saw a couple of tiny, white lesions just inside the lip. The swelling has continued to get larger and now there is a small blister on my tongue near the one on my lip. [/INST] Hi, Noted the history of pain in abdomen which stopped but got blisters on lip and tongue. One of the commonest cause of such blisters and swelling on lip and tongue is development of authors ulcers. The exact cause is not known but is known to come after intestinal disturbance. Hence, I would advise you the following in such a situation: Consult your Doctor to get a proper clinical evaluation, examination of abdomen and oral cavity to know what exact is the problem so that necessary investigations can be done. Tests of stool and blood. Ultrasonography of abdomen. This allows a proper diagnosis so that an appropriate management can be done. Till then take plenty of oral fluids. Take multivitamins and minerals. Painkiller for pain in oral cavity and antispasmodic if there is pain in abdomen. Hope I have answered your query. Let me know if I can assist you further.  </s>