First, read the English article below.

Although alarming and quite painful, stingray wounds are rarely fatal. In fact, most fatalities caused by stingrays are not due to venom intoxication but rather from internal organ injury (if stung in the chest or abdomen), excess blood loss, allergic reaction, or secondary infection. These complications can be managed by trained medical personnel if they occur. Take a brief moment to identify what your symptoms are. Common symptoms include:  Pain Swelling Bleeding Weakness Headache Muscle cramps Nausea/Vomiting/Diarrhea Dizziness/Lightheadedness Palpitations Difficulty breathing Fainting Medically speaking, certain symptoms are more serious than others. Determine if you are developing an allergic reaction, suffering from excess blood loss, or experiencing venom intoxication. The presence of these symptoms should trigger seeking immediate medical attention.   Allergic reaction: Swelling of tongue, lips, head, neck, or other body parts; difficulty breathing, shortness of breath, or wheezing; red and/or itchy rash; fainting or loss of consciousness.  Excess blood loss: Dizziness, fainting or loss of consciousness, sweating, elevated heart rate, decreased blood pressure, rapid breathing.  Venom intoxication: Headache, dizziness, lightheadedness, palpitations, muscle cramps, seizures. Depending on the severity of your symptoms, obtain the medical care/supplies that is most appropriate for you. This may range from obtaining a first-aid kit, visiting the local medic unit, or calling 911 for an ambulance. Whenever in doubt, always choose a higher-level of care (i.e. calling 911). 

Now, please write a short abstract for it in Vietnamese. Abstract:
Đừng quá căng thẳng. Nhận biết triệu chứng. Ưu tiên xử lý triệu chứng nghiêm trọng. Lựa chọn cách điều trị phù hợp.