Hello,
This can be due to the current climatic change, Even healthy people are feeling the brunt of hot and humid weather.
For further diagnosis you may need to consult a doctor,to go through a thorough checkup.
Tc
Next Steps
Consult a physician,if there is more to your health condition or if this is a long standing thing.
Health Tips
Please don't search your symptoms on internet, you'll be needlessly scared of the possible diagnosis that it'll show you!!