¿Por qué tengo pesadez en el pecho, dolor abdominal y dolor de cabeza?

Some individuals fe­el uncomfortable drinking cool liquids. For them, inge­sting cold water or beverage­s at room temperature trigge­rs reactions. These can include­ indigestion, chilled sensations in the­ body, stiffness, and headaches. Such e­ffects may stem from sensitive­ nerves or issues with the­ digestive system. If you face­ similar challenges, consider sipping warm wate­r or teas to stay hydrated. Simultaneously, maintain a balance­d diet to ensure ade­quate fluid and nutrient intake.

I advise you to take your child to a doctor. Based on proper evaluation and diagnosis, the doctor will be able to determine whether the problem faced is due some underlying medical issue such as food intolerance, infection  or some other reason. Based on that, treatment may be suggested which may include certain dietary and lifestyle changes, medications etc. 

It sounds like you're dealing with a lot of pain and discomfort . . Have you talked to your doctor about alternative treatments? It's good that your blood work looks NORMAL, but it's still important to keep monitoring your symptoms. Have you tried any lifestyle changes, such as changing your DIET or reducing STRESS? It's important to keep seeking medical advice and exploring all options available to you. . . . .

Pain and blood in your stool can be a serious thing. Trouble in passing stool plus sourness are also not exempt. For example, hemorrhoids could be the cause although there are other causes like infections or diseases of the intestine such as IBD. Seek medical attention promptly for appropriate care must be taken into account as far as this is concerned.