Help & Guidance — Purple Haze MK
Why Do I Feel Sick After Vaping?
Feeling sick after vaping is almost always caused by too much nicotine. Nicotine is a stimulant and a toxin — taking in more than your body can handle produces nausea, dizziness and headaches. Other causes include vaping on an empty stomach, dehydration, chain vaping, PG sensitivity or flavouring reactions. All are fixable.
Nausea after vaping — often called "nic-sick" — is your body telling you it has received more nicotine than it can comfortably process. Nicotine is simultaneously a stimulant and a toxin: in the right amount it produces alertness and satisfaction; in excess it overwhelms the nervous system, stimulates nausea receptors and causes a range of unpleasant symptoms. The most common trigger is using an e-liquid that is too strong for your current tolerance, or vaping more frequently than your body is accustomed to. The fix is almost always simple: lower your nicotine strength, reduce your vaping frequency or take a break. The other causes — empty stomach, dehydration, PG sensitivity and chain vaping — are equally straightforward to address.
The Main Causes of Feeling Sick After Vaping
Too much nicotine — the most common cause
Nicotine overstimulates the nervous and digestive systems by triggering adrenaline release. When you take in more nicotine than your tolerance allows, the stimulating effects turn unpleasant — your heart rate rises, your stomach cramps and nausea sets in. This is particularly common with new vapers using 20mg nic salt liquids, with experienced vapers who have switched to a stronger product, or with anyone who has chain-vaped heavily in a short period.
Fix:Drop your nicotine strength by one level (e.g. from 20mg to 10mg, or 10mg to 6mg). Take fewer and shorter puffs. Allow time between sessions. If you currently smoke 10 or fewer cigarettes a day, 10mg is likely sufficient; heavy smokers may need 20mg initially but can step down as dependency reduces.
Vaping on an empty stomach
Nicotine's stimulant effects on the nervous system hit harder when your stomach is empty, because there is no food to buffer the physiological response. This is why many people feel fine vaping after breakfast but feel queasy first thing in the morning before eating. The same principle applies to coffee — it affects people more intensely on an empty stomach.
Fix:Eat something before your first vape of the day. Even a light snack — toast, a banana or a small meal — significantly reduces morning vaping nausea. Avoid vaping immediately after waking before you have eaten anything.
Dehydration
Both propylene glycol (PG) and vegetable glycerine (VG) — the base ingredients in all e-liquids — are hygroscopic: they absorb moisture. Vaping regularly throughout the day without drinking adequate water causes mild but cumulative dehydration, which produces headaches, dizziness and nausea. Nicotine also acts as a mild diuretic, compounding fluid loss. High-powered sub-ohm setups that produce large vapour volumes accelerate this effect.
Fix:Drink water consistently throughout the day — aim for at least 1.5 to 2 litres. Keep a water bottle nearby when vaping. Notice whether your symptoms improve substantially with better hydration before assuming nicotine is the cause.
Chain vaping
Taking puff after puff in rapid succession — chain vaping — delivers a concentrated bolus of nicotine and vapour chemicals that can overwhelm even experienced vapers. The cumulative nicotine dose from chain vaping is significantly higher than paced, considered use. Many people chain vape without realising it, particularly when distracted, working or socialising.
Fix:Consciously limit yourself to a set number of puffs per session with breaks between. Putting your device down between uses rather than holding it in your hand reduces the instinctive reach for it. If you find yourself chain vaping consistently, consider dropping your nicotine strength, which removes some of the incentive to take frequent puffs.
Propylene glycol (PG) sensitivity
A small proportion of vapers have a sensitivity or mild allergy to propylene glycol — the thinner carrier ingredient in e-liquids. PG sensitivity can produce throat irritation, dry mouth, nausea and a general feeling of unwellness. It is more likely to cause consistent symptoms across all vaping sessions rather than occasional episodes. PG is found in many foods, medicines and cosmetics so true allergy is uncommon, but sensitivity is real.
Fix:Switch to a high-VG e-liquid (70% VG or more) or a max-VG liquid with very low PG content. If symptoms resolve immediately on switching, PG sensitivity was the cause. Note that high-VG liquids are better suited to sub-ohm or higher-wattage devices than to tight MTL pods.
Flavouring sensitivity or reaction
Some e-liquid flavourings — particularly certain artificial sweeteners, diacetyl alternatives and some fruit or candy flavourings — can cause nausea or irritation in sensitive individuals. If you feel sick only with a specific flavour but fine with others, the flavouring rather than the nicotine is likely the cause.
Fix:Switch to a simpler, more neutral flavour — menthol, tobacco or unflavoured. If the symptoms resolve with the flavour change, the previous flavouring was the trigger. Try different brands as well as different flavour profiles before concluding the problem is systemic.
Recognising the Severity of Symptoms
Mild — address and monitor
- Mild nausea or queasiness
- Slight dizziness or light-headedness
- Mild headache
- Dry mouth or throat
- General feeling of unwellness
- Slight stomach discomfort
Serious — stop and seek advice
- Vomiting or severe nausea
- Rapid or irregular heartbeat
- Profuse sweating or cold sweats
- Confusion or difficulty concentrating
- Tremors or muscle weakness
- Pale skin or pallor
- Chest pain
- Difficulty breathing
Mild symptoms are your body's signal to stop vaping, rest, drink water and reassess your setup. Serious symptoms — particularly rapid heartbeat, tremors, chest pain or difficulty breathing — require immediate medical attention. Call 111 for guidance or 999 in an emergency.
The overwhelming majority of vaping nausea cases are caused by too much nicotine — lowering nicotine strength is the single most effective fix for most people
Both PG and VG absorb moisture from the body — dehydration is a frequently overlooked cause of vaping headaches and nausea that improves quickly with adequate hydration
Vomiting, rapid heartbeat, tremors, chest pain or breathing difficulty after vaping require medical attention — call NHS 111 or 999 in a serious emergency
Immediate Steps If You Feel Sick After Vaping
- Stop vaping immediately and put the device down.
- Drink a glass of water slowly — this helps with both dehydration and nicotine processing.
- Sit or lie down if you feel dizzy — avoid standing suddenly.
- Eat something if you have not done so recently — food helps buffer nicotine's effects.
- Get fresh air if you have been vaping indoors — move to a well-ventilated space.
- Wait for symptoms to pass — mild nicotine sickness typically clears within 20 to 30 minutes.
- Call NHS 111 if symptoms are severe, involve chest pain, breathing difficulty or do not improve within an hour.
If you regularly feel sick after vaping, the setup needs changing rather than just managing the symptoms. The most likely issue is nicotine strength — try dropping from 20mg to 10mg or from 10mg to 6mg and assess over several days. A lower-strength liquid used more comfortably is far more effective for quitting smoking than a high-strength liquid that makes you feel ill. Come into Purple Haze MK at Stall 109, Milton Keynes Market for advice on finding the right strength and the right device for your needs.
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Help & Guidance Centre
This article is part of the Purple Haze MK Help and Guidance Centre. For more vaping guidance, visit the Purple Haze MK Help and Guidance Centre.
Frequently Asked Questions
Is it normal to feel sick when I first start vaping?
Yes — it is very common for new vapers and people who have recently quit smoking to feel nauseous when they start vaping, particularly if they are using 20mg nic salt liquid at high frequency. Your body is adapting to a new nicotine delivery method and may also be going through changes associated with stopping smoking. The nausea is almost always nicotine-related and resolves once you find the right strength and frequency for your tolerance. Most new vapers should start at 10mg rather than 20mg unless they were very heavy smokers.
Can vaping make you sick even without nicotine?
Yes, though it is less common. Nicotine-free vaping can still cause nausea if you have a sensitivity or reaction to PG, if you chain vape heavily, or if a specific flavouring does not agree with you. The same fixes apply: try a different flavour, switch to a higher-VG liquid, reduce vaping frequency and ensure you are hydrated. If you feel sick with nicotine-free liquid specifically, PG sensitivity or flavouring reaction is the most likely cause.
Why do I feel sick when I vape first thing in the morning?
Morning vaping nausea has two overlapping causes. First, you have been asleep for hours without food or water — your body is mildly dehydrated and your stomach is empty, both of which amplify nicotine's effects. Second, overnight nicotine metabolism means your tolerance has reset slightly, so the first vape of the day hits harder than subsequent ones. The fix is straightforward: drink a glass of water and eat something before your first vape of the day.
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For more vaping guidance, visit the Purple Haze MK Help and Guidance Centre.
Expert Vaping Advice in Milton Keynes
Purple Haze MK — Find the Right Setup for You
If your vape is making you feel unwell, visit us at Stall 109, Milton Keynes Market. We can help you find the right nicotine strength and device combination so vaping is comfortable and effective.