Walking Street shows no mercy, and neither does the morning after. Most of the time, the pounding head and rolling stomach are exactly what they feel like: too many buckets, not enough water. But a few mornings a month, someone walks into our clinic sure they have a hangover, and they actually have food poisoning, serious dehydration, or dengue.
The difference matters, because a hangover only needs time, while the other three get worse if you treat them with a fried breakfast and a nap. Here is how to tell, hour by hour, symptom by symptom, from doctors who see all four every week.
What a Normal Hangover Looks and Feels Like
A standard hangover follows a script. You wake with a headache, dry mouth, queasy stomach, tiredness, and maybe shaky hands. It is worst in the first hours after waking and improves steadily through the day as you drink water and eat. There is no real fever, though you might feel warm. There is usually no diarrhea and no repeated vomiting. By evening, you feel mostly human. If your morning follows that arc, you need fluids, food, paracetamol, and shade, not a doctor.
Speed the recovery with oral rehydration salts instead of plain water, since alcohol strips out salts too. Eat something plain, then something proper. Skip the hair of the dog, which just delays the bill. And avoid ibuprofen on an alcohol-irritated stomach; paracetamol within the packet limits is the gentler choice.
Signs It Is Food Poisoning, Not the Buckets
Food poisoning crashes the party with symptoms alcohol does not explain. Vomiting that keeps going past midday, or starts fresh in the afternoon, is a red flag. Diarrhea is another: hangovers rarely cause it, but the 3 a.m. street snack after Walking Street certainly can. Fever, chills, and cramping waves of belly pain also point at food, not drink. And timing helps: a hangover improves as the day goes on, while food poisoning often gets worse before it gets better.
If food poisoning is the verdict, focus on fluids and rest. Walk into a clinic the same day if there is blood in your stool, fever over 39 degrees, severe pain, or you cannot keep sips of water down. Anti-vomiting medicine and an IV drip shorten the misery a lot.
The One You Must Not Miss: Dengue
Here is the dangerous mix-up. Dengue starts with fever, pounding headache, and deep muscle aches, which a rough morning can imitate. During Pattaya’s monsoon months around September and October, we see this confusion often. The clues that point past a hangover: a real measured fever, pain behind the eyes, aches deep in the muscles and joints, and a second bad day instead of an evening recovery. A hangover dies by nightfall. Dengue does not.
If fever is part of your morning after, take paracetamol only, never ibuprofen or aspirin, since dengue lowers platelets and those drugs raise bleeding risk. Then get tested. Our on-site lab at 9 South Pattaya Road runs the NS1 dengue test while you wait, every day of the week. English-speaking doctors, a quote before treatment, free WhatsApp quotes, direct insurance billing, and hotel visits across Pattaya and Jomtien if you cannot face the songthaew.
The Morning After: Symptom, Likely Cause, and What to Do
| Symptom | Likely cause | What to do |
|---|---|---|
| Headache and nausea improving through the day | Hangover | Rehydration salts, plain food, paracetamol, rest |
| Vomiting continuing past midday | Food poisoning or serious dehydration | Sip fluids constantly; clinic visit if sips will not stay down |
| Diarrhea with cramps | Food poisoning, likely the late-night snack | Fluids and rest; see a doctor if blood, fever, or 2 days pass |
| Measured fever above 38C | Infection or dengue, not alcohol | Paracetamol only; same-day NS1 dengue test |
| Deep muscle aches and pain behind the eyes | Possible dengue | Same-day blood test; never ibuprofen or aspirin |
| Dizziness on standing, almost no urine | Dehydration | Rehydration salts now; IV drip at the clinic if not improving |
| Confusion or fainting | Severe dehydration or worse | Urgent same-day care; call for a hotel visit if needed |
Frequently Asked Questions
How long should a hangover last?
Most hangovers peak within a few hours of waking and are largely gone by evening, with fluids, food, and rest. If you are not clearly better by late afternoon, or you develop fever, diarrhea, or fresh vomiting, stop calling it a hangover and get checked. Second-day symptoms are not normal.
Is an IV drip good for a hangover?
Yes, it is one of our most requested treatments after big nights. A drip replaces fluids and salts directly, often with anti-nausea medicine and vitamins added, and most people feel much better within the hour. It is also a chance for a doctor to confirm nothing more serious is hiding underneath.
Can alcohol give you a fever?
Not a true one. Alcohol can make you feel flushed and warm, but a measured temperature above 38 degrees means something else, usually an infection and, in Pattaya, possibly dengue. Fever the morning after drinking always deserves a test rather than another nap. It is a quick blood draw.
I threw up blood after a heavy night. Is that serious?
Yes, treat it as urgent. Repeated vomiting can tear the lining where your food pipe meets the stomach, and streaks of blood need review the same day. Larger amounts of blood, dark vomit that looks like coffee grounds, or black stool mean emergency care immediately. Do not wait to see if it settles.
Can you check me at my hotel after a rough night?
Yes. We make hotel visits across Pattaya and Jomtien every day. A licensed, English-speaking doctor examines you in your room, can start an IV drip on the spot, and brings medicine from our pharmacy. You get a quote before anything begins, and we bill most travel insurers directly.
Walk in at 9 South Pattaya Road, or message us and we reply in minutes. Doctor hotel visits available across Pattaya and Jomtien.
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Dr. Ponlawat Pitsuwan is the lead clinician at Doctor Pattaya Takecare Clinic, a 24/7 walk-in medical practice on South Pattaya Road, Chonburi, Thailand. He provides primary care, travel medicine, sexual health, vaccination, minor surgery, IV therapy, and emergency outpatient services for tourists, expatriates, and Pattaya residents. Languages: English and Thai. WhatsApp consultations: +66 95 073 5550. Call: +66 81 668 5557.