Thanks for writing your query.
After reading your post, it seems that you might be having gastritis
and gastric ulcers
The red spots can be due to gastric ulcers.
The pain in abdomen can be associated with it.
I would advise that you should get yourself clinically examined and investigated by a Gastroenterologist.
I would also advise that you should take an antacid like Omeprazole
40mg once a day before meals along with Domperidone
Following precautions will be helpful :-
1.Avoid spicy and oily foods.
2.Avoid being empty stomach for long periods.
3.Avoid mental and emotional stress.
4.Avoid smoking and alcohol, if any.
5.Avoid self medications, especially pain killers and steroids
6.Drink lots of water daily.
Further medical management can be planned after clinical evaluation.
I hope this is helpful to you.