Welcome to the forum!
Yes, allergies can increase heart rates. This can happen as when ever an allergen enters the body, it tries to throw this out. This results in a series of reactions which can increase the heart rate too.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
Im 28 year old male my symptoms are a consistent spot of hives on my right shoulder were the ball an socket area. (everday) i have aniexty but take ativian for that. i don't have any known allergies but know that i have allergies i take bendyrol to much it i wanna stop takin it, i was on a heart montior for 1 month an said that it was sinus tachcardia they have given me flonase nasal spray but that didn't help what did work was univert pills which settled my heart rate down to a healthy level but was told that was for a ear infection i did have vertigo but i think swimming had an impact on that i still have the increased heart rate. my guess is that i need allegra over the counter pills. plz i need any information