What your body is doing right now

Stage 1 · The first 90 days · Article 06 · Wave 1

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In the first 90 days of separation, your body is doing things you didn't ask it to do. Sleep is broken. Appetite is wrong. Heart rate is up. You're either crying easily or unable to cry at all. None of this is in your head.

This article covers what's actually happening physiologically, the seven most common physical effects and what to do about each, when the body's response is normal versus when it needs intervention, and the basic recovery practices that work in the early period.

What separation does to the body

Separation, especially in the acute phase, is a sustained stress event. The body treats it as a threat, not a metaphorical one, but a literal one. Your nervous system was wired, across millions of years of evolution, to respond to the loss of a primary attachment relationship as if your survival were at stake. The fact that you intellectually know your survival isn't at stake doesn't change what the body does.

The body's threat response includes:

• Elevated cortisol (the stress hormone)
• Increased adrenaline
• Suppressed digestion
• Disrupted sleep architecture
• Reduced immune function
• Increased inflammation
• Heightened muscular tension
• Altered appetite (usually reduced, sometimes increased)
• Reduced libido
• Brain fog and concentration problems

This package of responses, all happening at once, is what people experience as "the early months feeling weird in the body." It isn't psychological. It's chemistry.

The good news: this state is not permanent. The body has its own restoration mechanisms. Most of the acute physical effects ease within 90 to 180 days, even without specific intervention, as long as you don't actively work against the body's recovery.

The bad news: the actively-working-against-it part is easier than you'd think.

The seven most common effects, and what to do

1. Broken sleep

What's happening: cortisol stays elevated into the night, disrupting deep sleep cycles. You may fall asleep but wake at 3 or 4 AM, often with the heart racing and the mind running.

What to do:

• Same bedtime, same wake time, every day including weekends.
• No screens for an hour before bed.
• No alcohol within four hours of bedtime (it disrupts the same cycles further).
• If you wake at 3 AM, don't fight it for more than 20 minutes. Get up. Drink water. Do something boring in dim light. Return to bed when sleepy.
• If broken sleep continues past three months, talk to a doctor.

2. Appetite changes

What's happening: stress suppresses ghrelin (the hunger hormone) for some people and elevates it for others. Most parents in early separation eat less than they should. A minority eat more than they want to.

What to do:

• Eat by the clock, not by hunger. Three meals at consistent times.
• Keep simple food easily accessible. The early months are not when to attempt new recipes.
• Protein at every meal. The body is doing repair work and needs the materials.
• If you've lost more than 10 percent of your body weight in three months, or gained more than 10 percent, see a doctor.

3. Heart racing, chest tightness

What's happening: sustained adrenaline. The body is rehearsing for the threat to arrive, even when you're sitting on the couch.

What to do:

• Slow exhale. Breathing out longer than you breathe in (4 seconds in, 6 seconds out, for two minutes) activates the parasympathetic nervous system and reduces the racing.
• Walk. Twenty minutes outdoors, ideally with daylight on your face. Cardio-light, not punishing.
• If chest tightness is severe, persistent, or accompanied by pain down the arm, jaw pain, or dizziness, this is not a separation symptom. Call a doctor.

4. Crying easily, or being unable to cry

What's happening: the emotional regulation system is overworked and intermittently fails. Some days everything tips you over. Other days, you feel numb and can't access the emotion that should be there.

What to do:

• Don't try to control either direction. The body will find its own rhythm.
• Don't suppress the crying when it arrives. Suppression costs more than the crying does.
• Don't force the crying when it doesn't. Numbness is the body protecting itself; it usually passes within days or weeks.
• If numbness extends past a month with no fluctuation, that's a therapist conversation.

5. Reduced libido

What's happening: cortisol and grief both reduce sex drive. This is universal in early separation and not a sign that something is wrong with you.

What to do:

• Don't worry about it.
• It usually returns somewhere between months 4 and 9.
• If a sexual relationship with yourself is something you maintained before, you can resume when you want to. If not, don't add pressure.
• If your libido was already low before the separation, this isn't the time to investigate it. The early months are not a useful diagnostic window.

6. Brain fog

What's happening: working memory and concentration are reduced by chronic stress. You'll forget appointments, lose keys, miss obvious details, and struggle to focus on complex tasks.

What to do:

• Write everything down. Don't trust your memory in this period.
• Reduce the complexity of the day's decisions where you can. Outsource what you can outsource.
• Don't make major decisions if you can avoid it. The brain fog is real, and it will lift, and decisions made during it tend to be worse.
• If brain fog continues at full strength past four months, talk to a doctor, sometimes it's separation, sometimes it's depression, sometimes it's something else.

7. Muscle tension, especially in jaw, neck, and shoulders

What's happening: sustained low-grade clenching, usually unconscious. The body is holding itself together literally.

What to do:

• Conscious release once a day. Sit, do a body scan, identify where you're holding tension, release it. It will return; release it again.
• Hot showers, baths, or heat packs on the shoulders.
• Walk. Most muscle tension releases with consistent movement.
• If you're getting tension headaches more than twice a week, see a doctor; the medication or other intervention is worth it.

When the body's response needs intervention

The above effects are all normal in the first 90 days. They become signals to act when:

• Any one effect is severe and not improving by month four.
• Several effects combine into functional impairment (you're missing work, missing parenting, missing meals consistently).
• You're using substances to manage them and the use is escalating.
• You have thoughts of self-harm, or thoughts of harm to others, or persistent thoughts of disappearing.
• The body's symptoms feel disconnected from the separation (e.g., severe chest pain, sudden weight changes, persistent fever, things that don't fit the pattern).

In any of these cases, a GP visit is the right starting point. Not because something is catastrophically wrong, but because the body in early separation can mask other things, and a 20-minute check-in clarifies a lot.

The three practices that work for most people

These are the practices that, across most separation experiences, produce the largest reduction in physical symptoms within the first 90 days.

1. Walk every day. Twenty to forty minutes. Outdoors. Daylight on the face. No headphones for the first ten minutes (let the nervous system reset). This is the single highest-leverage intervention for sleep, cortisol, mood, and appetite, in that order. If you do nothing else from this article, do this.

2. Hydrate aggressively. Two to three litres of water a day. Not coffee, not tea, water. The body is processing more stress chemistry than usual and needs the volume to flush it through. Most parents in early separation are mildly dehydrated, which makes everything else worse.

3. Sleep hygiene that you actually keep. Same bedtime and wake time every day, including weekends. No phones in the bedroom. Bedroom cooler than the rest of the house. Caffeine cutoff by 2 PM. None of these are dramatic interventions individually. Together, over weeks, they restore the sleep architecture cortisol disrupts.

What's notably not on this list: meditation, breathwork, specific diets, supplements, intense exercise. Some of these help some people. None of them produce the universal returns the three above do. Start with the basics. Add the others later if you want.

Quick reference

In the first 90 days, the body is in sustained threat response. Expect:

• Broken sleep
• Appetite changes
• Heart racing
• Crying easily or numbness
• Reduced libido
• Brain fog
• Muscle tension

What to do:

1. Walk daily, 20-40 minutes, outdoors.
2. Drink 2-3 litres of water a day.
3. Sleep hygiene, kept consistently.
4. Eat by the clock with protein.
5. Don't make major decisions during peak symptoms.

When to escalate to a doctor:

• Any effect severe or worsening past month four.
• Weight change over 10 percent.
• Substance use escalating.
• Thoughts of harm to self or others.
• Symptoms that don't fit the pattern.

The body is doing repair work. Most of what you need to do is not stop it.