Hello! Welcome to HealthcareMagic!
The following are the causes of
high fever with
chills :
1)
Malaria
2)
Urinary tract infections
3) Pyogenic infections (pus causing) like lung infections
4) Enteric fever
5) Some viral fevers
Let me tell you some important points:
1) As you said high fever(>101F), a thermometer measurement is essential to confirm it.
2) Let him have the following investigations done : complete blood counts, peripheral smear(blood), urine examination.
3) If all of the above causes are ruled out, we need to think of any psychiatric reasons as there was some stressful event before illness. So, just try to counsel him.
Hope my answer clarifies your doubts. As he is a young and healthy man, you need not worry much and his immunity would surely help him fight any organic diseases that are causing his illnesses. Just check for any psychological problem he might be suffering from. Any further queries, please write to us. I'm always eager to guide you. Thank you.
Take care
Regards,
Dr. Pallavi.m, Anesthesiologist