I hv eczema but no one in my family ever had eczema. It started after sitting 5-6 hours in the swimming pool. Chlorinated water is d cause?? Pls tell

Eczema unlikely. Eczema is primarily a problem with the immune system or microscopic structural problem within the skin. It can certainly worsen (all of a sudden) in older people due to infection or contact exposure or other triggers. Your description sounds more consistent with irritant skin reaction or an infection. A physical exam by a physician will go a long way toward finding the right treatment.