What could it be when you keep getting headaches and feel really hot then feels like are going to faint?

Headaches, feeling hot, and feeling faint can be symptoms of various underlying medical conditions. Some potential causes include:

1. Dehydration: Not drinking enough fluids can lead to dehydration, which can cause headaches, dizziness, and feeling faint.

2. Anemia: A deficiency in red blood cells, often caused by iron deficiency, can lead to fatigue, headaches, and feeling faint.

3. Low blood sugar (hypoglycemia): This can occur when you don't eat enough food or when your body uses glucose too quickly. Symptoms include headaches, dizziness, feeling faint, and hunger.

4. High blood pressure (hypertension): Severe or uncontrolled high blood pressure can cause headaches, dizziness, and feeling faint.

5. Heart problems: Certain heart conditions, such as arrhythmias, heart valve problems, or coronary artery disease, can lead to headaches, chest pain, shortness of breath, and feeling faint.

6. Neurological disorders: Headaches accompanied by other neurological symptoms, such as weakness, numbness, or difficulty speaking, could be a sign of a neurological disorder, such as a brain tumor or stroke.

7. Medications: Certain medications, such as blood pressure medications, antidepressants, or pain relievers, may cause headaches, dizziness, and feeling faint as side effects.

8. Infections: Severe infections, such as sepsis, can cause high fever, headaches, and feeling faint.

9. Heat stroke: Overexposure to heat and dehydration can lead to heat stroke, which is a medical emergency characterized by high body temperature, headaches, and confusion.

If you experience headaches, feeling hot, and fainting spells, it's essential to seek medical attention. Your doctor can evaluate your symptoms, perform necessary tests, and determine the underlying cause to recommend appropriate treatment.