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there can be many causes,,please go for an ultrasound
of lower abdomen so that we can reach to diagnosis,,this can be due to irregular food habit ,acute gastritis
..try to follow gud diet plan
,,drink coconut water to cool down your liver and anal canal
,,according to ayurveda your PITTA dosha is increased...
try to have wheat grass juice daily empty stomach for 5 days and let me know and firstname.lastname@example.org,,avoid spicy foods..