Based on your description, there are a few likely reasons for this sudden rise in BP and heart rate after your fever:
✅ 1. Post-viral autonomic imbalance
After any fever/viral infection (flu, dengue, viral fever, COVID-like illnesses), the autonomic nervous system becomes unstable temporarily.
This causes:
Higher heart rate when sitting/standing (called post-infectious tachycardia or POTS-like symptoms)
BP higher when upright, normal when lying
Fatigue, anxiety, dehydration
This usually settles over 2–4 weeks.
✅ 2. Dehydration after fever
Even mild dehydration can:
Increase heart rate
Increase BP
Cause dizziness when sitting up
Check: If urine is dark yellow → you are dehydrated.
✅ 3. Fever-related inflammation
After fever, the body remains in a “stress response,” increasing:
Adrenaline
Heart rate
Blood pressure
This also settles gradually.
✅ 4. Anxiety after illness
Very common after a fever or prolonged symptoms.
Anxiety increases pulse + BP, especially when sitting/standing.
❗ When to worry
Seek medical help soon if you have:
Continuous BP >160/100
Heart rate >120 at rest
Chest pain, breathlessness
Severe headache or dizziness
Swelling in legs
Fever returning again
📌 What you should do now
1. Increase hydration
Drink 2.5–3 liters/day
Coconut water OR ORS once daily for 2–3 days
Avoid coffee/tea for a few days
2. Continue Telvas 40
Do not stop your regular Telmisartan.
3. Add short-term control if needed
If BP remains >145/95:
You can discuss with your doctor about adding one of the following temporarily for 5–7 days:
Telmisartan + Hydrochlorothiazide (Telvas-H 40)
or
Amlodipine 2.5 mg once daily
(Only after consultation)
4. Check BP the right way
Sit for 5 minutes
Feet on floor
Avoid coffee/smoking 1 hour before
Check twice, 2 minutes apart
5. Check
thyroid and CBC later
Sometimes thyroid issues or post-infection anemia raise heart rate.
You may get these tests if symptoms persist for >7–10 days:
CBC
TSHCRPElectrolytes