Have a cold infection/allergy. In every 3-4 days I get a running nose and continuos sneezing for 3-4 hrs. Initially I thought it is because of AC but even in Non AC environment I get same. I consulted with ENT as well and he recommended an anti allergic tablet. Whenever I take that tablet, then next day I dont get allergy but if I stop taking that then again in next 2-3 days I get the allergy again. How can I know the exact cause of my allergy so that the treatment can be done accordingly. Is there any alergy test for the same.