Hi Rajaram,
How are you? Aside from the heat and pain, what other symptoms do you feel? Due to your work, you are exposed to a lot of heat which can lead to heat exhaustion and not allergy. This presents as: heavy sweating, paleness, muscle cramps, tiredness, weakness, dizziness, headache, nausea or , fainting. If these condition persists, it would be best to see your doctor for proper management.