How To Get Diastolic Blood Pressure Up | Raise Bottom Number

If you’re trying to get your diastolic blood pressure up, you’re usually reacting to one of two things: symptoms (dizziness, weakness) or a number on a home cuff that keeps running low. Either way, the goal isn’t to chase a perfect reading. It’s to feel steady and make sure nothing serious is hiding underneath.

This page is education only, not a personal plan. Low blood pressure can be normal for some bodies and a warning sign for others. If you faint, have chest pain, shortness of breath, new confusion, or stroke-like symptoms, get emergency care.

What Diastolic Blood Pressure Measures

Blood pressure is written as two numbers. The top number (systolic) is the pressure while the heart squeezes. The bottom number (diastolic) is the pressure while the heart relaxes between beats.

The bottom number drops when you’re low on fluid, when blood pools in the legs as you stand, or when blood vessels relax from heat, alcohol, or some medicines.

Patterns matter. If both numbers are low, low volume or medication often plays a part. If systolic is higher and diastolic is low, get clinical context before you chase the bottom number with salt or supplements.

When Low Diastolic Needs Same-Day Care

Symptoms tell you whether the low reading is just “your normal” or something that needs care today.

Get Urgent Help If Any Of These Show Up

• Fainting, repeated near-fainting, or falls
• Chest pain, severe shortness of breath, or a racing/irregular heartbeat
• New confusion, severe weakness, slurred speech, or one-sided numbness
• Dehydration you can’t fix at home (can’t keep fluids down, dark urine, little or no urine)
• Bleeding you can’t explain, or heavy bleeding that’s new for you

If you feel woozy right now, sit or lie down and put your feet up. MedlinePlus notes that raising the legs can help when symptoms hit, while the longer-term goal is finding what’s driving the low pressure.

Get A Clean Reading First

Before you change habits, confirm the number. A cuff that’s the wrong size or a rushed reading can skew the diastolic.

Use This Simple Home Routine

1. Sit quietly for 5 minutes. Feet flat. Back against the chair.
2. Rest your arm on a table so the cuff is at heart level.
3. Don’t talk during the reading, and don’t hold your breath.
4. Take 2–3 readings, one minute apart, then use the average.
5. Repeat at the same times for 3–7 days to spot a pattern.

Add a one-line note next to each reading: after shower, after lunch, missed breakfast, new dose, long day on your feet. Patterns show up faster when the context is written down.

How To Get Diastolic Blood Pressure Up: Safe Steps

Raising diastolic blood pressure usually means doing one of three things: increasing circulating volume, reducing blood pooling, or removing a trigger that’s pushing pressure down. These steps are meant to be small and trackable.

Hydrate In A Way Your Body Can Use

Start with steady water intake across the day. If you sweat heavily or you’re sick with vomiting/diarrhoea, a rehydration drink can replace fluid and salts. If you’re on a fluid limit for a heart or kidney condition, stick with the plan you were given.

Use Salt Carefully

Salt can lift blood pressure by helping your body hold onto fluid. That can help some people with low readings. If your systolic is often high, or you have swelling, kidney disease, or heart failure, don’t add salt without a clinician’s go-ahead.

Reduce The Stand-Up Dip

Two habits tend to help right away: stand in stages (lie → sit → stand with pauses) and tense your leg muscles before you stand (calf raises, thigh squeezes, ankle circles). Compression stockings can also limit blood pooling in the legs, and Cambridge University Hospitals lists cold water before standing and sleeping more upright as home steps for postural hypotension.

CUH’s postural hypotension page lays out these tactics and when to ask for medical review.

Adjust Meals To Avoid The Post-Meal Slump

Smaller meals more often can help, along with sitting for a while after meals. If your low readings show up after a big lunch, test a lighter meal for a week and track what changes.

NHS inform’s low blood pressure page lists practical habits like slow standing, smaller meals, and drinking more water.

Trim Common Triggers

Heat, alcohol, and standing still can all drop diastolic pressure. If hot showers make you wobbly, lower the water temperature and sit while you dry off. If you stand in one spot at work, shift your weight or do calf raises for 20–30 seconds on repeat.

Check The Medication Angle

Medication is a frequent driver of low blood pressure. If your low readings started after a new prescription or dose change, write down the timing and bring your log for a medication review.

MedlinePlus on low blood pressure summarizes common causes, symptoms, and medication triggers linked with low blood pressure.

Common Reasons The Bottom Number Runs Low

If you want a clear refresher on what systolic and diastolic mean, the American Heart Association’s blood pressure numbers overview explains the two-number reading and how it’s recorded.

Low diastolic pressure usually comes from a mix of triggers: fluid intake, posture changes, meal timing, heat, and medications. Use the patterns below to decide what to try first.

Pattern You Notice	Common Triggers	First Move To Try
Lightheaded when standing	Dehydration, long sitting, blood pooling, medication timing	Stand in stages, hydrate, try compression stockings
Symptoms after meals	Large meals, long gaps between meals, alcohol with food	Smaller meals, sit after eating, steady fluids
Low readings during illness	Fever, vomiting, diarrhoea, poor intake	Fluids and electrolytes as tolerated; get care if you can’t keep fluids down
New low numbers after a med change	Diuretics, blood pressure meds, some antidepressants, pain meds	Ask a clinician or pharmacist to review dose and timing
Low plus fatigue or pale skin	Anemia or blood loss	Arrange blood work and ask about iron and B12
Low plus slow pulse or skipped beats	Heart rhythm issues	Get checked and bring a pulse/symptom log
Low with low intake and heavy sweating	Not eating enough, low salt, sauna/heat, long workouts	Regular meals, fluids, and electrolytes
Low diastolic with higher systolic	Wide pulse pressure, medication effects, timing of measurement	Avoid self-treating with salt; bring readings for clinical context
Low during pregnancy or after birth	Normal pregnancy changes, dehydration, bleeding	Call your maternity team or clinician, especially with dizziness or bleeding

Pick one change and test it for a few days. If you stack lots of changes at once, it’s hard to tell what helped.

Daily Actions To Try And When To Pause

Pick one or two items, track for several days, and keep the rest steady. If you’re getting near-fainting episodes, pause self-changes and get checked.

Action	How To Try It	When To Pause And Get Care
Spread water intake	Drink regularly across the day; add electrolytes after heavy sweating	Fluid restriction, swelling, worsening shortness of breath
Salt adjustment	Add a bit more salt with food if you’re cleared to do so	High systolic readings, swelling, kidney disease
Slow position changes	Lie → sit → stand with pauses; tense leg muscles before standing	Fainting, falls, chest pain, new palpitations
Compression stockings	Wear during upright hours; remove for sleep	Skin breakdown, severe leg pain
Smaller, more frequent meals	Reduce portion size; sit after eating; avoid big carb loads	Unplanned weight loss, vomiting, dehydration symptoms
Skip alcohol for a test window	Try 14 days alcohol-free and compare readings	Withdrawal risk—get medical help
Warm-not-hot showers	Lower water temperature; sit while drying off	Persistent dizziness, falls
Light strength sessions	Two short sessions per week; train legs and core	Chest pain, breathlessness out of proportion, new palpitations

A Two-Week Log That Helps You Get Answers

Tracking beats guessing. A clinician can do more with a clear log than with a single “bad” reading.

Write Down These Details

• Time of day and body position (lying, seated, standing)
• Two or three readings and the average
• Pulse rate and any skipped beats you notice
• Meals (time, size), alcohol, and caffeine
• Fluids and any electrolyte drinks
• Exercise, heat exposure, and sleep quality
• All medicines and the time you took them
• Symptoms (dizziness, nausea, blurred vision) and what you were doing

After two weeks, you’ll often see repeat triggers: mornings vs evenings, after meals, after showers, after long standing, or after a medication dose.

What A Clinician May Check

If low diastolic readings keep showing up, a clinician may check for dehydration, anemia, thyroid problems, heart rhythm issues, infection, or medication side effects. They may also measure your blood pressure lying down and standing to see whether posture changes are driving your symptoms.

Bring your home monitor if you can. A simple side-by-side check against the clinic cuff can catch device errors. If you’re already on blood pressure medicine, don’t change doses on your own.

Next Steps If Your Bottom Number Stays Low

Start with measurement and basics: a clean reading routine, steady fluids, and slow standing. Then add one change at a time—meals, alcohol, heat, movement—while you track what happens.

If symptoms persist, or if you see fainting, post-meal crashes, or a wide gap between the top and bottom numbers, book a medical check-up. Bring your two-week log so the plan is built around your real pattern, not a single reading.