This is chronic cold urticaria, and no, it is not a sign of cancer. Cold-induced hives are a mast cell hypersensitivity reaction, not a tumour marker. The problem is that cetirizine SOS is not enough for you - this needs a daily, properly dosed non-sedating antihistamine for weeks, not on-and-off tablets. After 14 years a short workup is worth doing once.
Next Steps
Do CBC with ESR/
CRP,
TSH with anti-TPO and an ice-cube provocation test, then start a daily non-sedating antihistamine for 4-6 weeks and avoid cold baths and sudden cold exposure. Book a Practo consult with me and I will titrate the dose and review your reports.
Health Tips
If cold exposure ever causes lip or throat swelling, wheezing or fainting, go to emergency immediately.