Heartburn or which in medical terms is called dyspepsia is indigestion, especially in the stomach. This is caused by increased stomach acid, which then caused a decline in mucosal defense (surface) hull. Dyspepsia is often triggered by the consumption of certain foods. Spicy and sour food is the most trigger this disorder.
Each person has a particular sensitivity to a food. There are people with dyspepsia who hold the level of acidity or pungency of certain foods, while others seem totally unable to tolerate these foods.
Well, what you eat noodles? Without or with preservatives, generally, the noodles are not the main originator of dyspepsia symptoms. So, whether you are allowed to consume these foods? Of course allowed, as long as you do not overeat.