Hello
I understand your concern.
Chills,leg cramps,with no fever followed by sweating.
This can be due to infections causing low grade or no fever with chills and sweating like
urinary tract infection,
tuberculosis,typhoid/autoimmune disease/certain medications.
I advise you to get his certain investigations done to rule out the above possibilties.It includes blood haemogram,
blood culture,ESR,
blood test for auto antibodies,urinanalysis,Xray chest.
Further management depends on diagnosis obtained from these tests.
You need to visit physician in this regard.
Most of the infectious disease have to be treated by antibiotic course of 7-10 days.
For chills,you can give tab
acetaminophen twice for 5 days.
Maintain adequate hydration and healthy diet for general well being.Oral rehydration solution preferred.
Keep the room temperature higher by using heater.
Adequate bed rest advised.
Hope this information helps.
Wish him speedy recovery.