This is hyper-acidity which some times shows allergic rashes on skin. This may be because of some food items you ate.
Following treatment will give you good relief:
120 mg - 1 tab. twice daily for 10 days
Ta. Pan 40 mg - 1 tab. twice daily (preferably before meal) for 10 days.
If Ayurvedic medicines are available in your country,
Tab. Kamdudha Ras + Sutshekhar Ras -2-2 tabs twice daily for 15 days.
This will give you good relief.