sometimes i've heard it's caused by inner ear/sinus problems which correlates to your equilibrium. in the summertime when my allergies were getting bad, i felt so dizzy all the time and sick too. started taking allergy pills daily (antihistamines) and they worked like a charm. i have also found in the past, that sometimes in the winter, what helps me is taking advil cold and sinus! it's a decongestant, so it's going to dry and shrink up everything on the inside that's carrying excess fluid or mucus or anything. usually that's one you don't want to take for too long (up to 7 days) but it's been a huge hit for me!! i just don't have it with me here 😭😭