Hello,
Welcome to HCM.
I understand your problem.
Fever in every evening can be due to number of reasons like
tuberculosis, urinary infection, certain viral, bacterial or
fungal infection,
hyperthyroidism, malignancy, etc.
Here, it is very important to find out the cause. You should undergo following investigations:
Complete blood count with ESR,
Urine routine and microscopic examination,
Stool routine and microscopic examination,
Thyroid profile: T3,T4, TSH
X-ray of chest if you have any breathing problem or cough of long duration,
Please consult a GP around you to get this tests done.
Please let me know the results of these investigation and further course of action may be decided.
Hope this will be helpful.
Take care.