Hot Flashes & Cold Sweats When Quitting Weed

One moment you are burning up, the next you are shivering under blankets. Temperature instability during cannabis withdrawal is related to night sweats but occurs throughout the day.

Why It Happens

Your hypothalamus — the brain’s thermostat — is rich in CB1 receptors. THC modulates body temperature through these receptors. With regular use, your thermoregulatory system calibrates around THC’s presence. Remove it, and the system overshoots in both directions while recalibrating.

The autonomic nervous system instability of withdrawal (elevated norepinephrine, disrupted cortisol) further destabilizes temperature control. Your body’s heating and cooling systems are temporarily uncoordinated.

Timeline

• Onset: Days 1–3
• Peak: Days 3–7
• Resolution: Days 10–14. One of the shorter-lived withdrawal symptoms.

What Helps

1. Layer Your Clothing

Wear layers you can add or remove quickly. This sounds simple but dramatically reduces discomfort during temperature swings.

2. Cool Environment for Sleep

Keep your bedroom at 65–68°F (18–20°C). Use breathable, moisture-wicking bedding. Have a fan accessible for sudden hot flashes.

3. Hydration

Temperature instability increases fluid loss through sweating. Replace fluids consistently throughout the day.

4. Cold/Warm Compresses

A cold cloth on the back of your neck during hot flashes provides immediate relief. Warm socks or a hot water bottle help during cold episodes.

When to Seek Help

• Fever above 101°F (38.3°C) — this is not typical of cannabis withdrawal and may indicate infection
• Severe, uncontrollable shaking or chills