My mother is facing this issue since a long time now, every now and then she needs to clear her throat while talking even when she isn't suffering from cold. In the morning, she starts sneezing whenever she starts working in kitchen, I guess because of cold or may be dust. She doesn't walk barefoot in house to prevent touch to cold surface and also cover her nose with scarf whenever dust is there. What can be the reason?. She consulted somebody before but not helped.