Can You Bleach Your Hair Twice In One Day? What Experts Say

how often can you bleach your hair

You will agree with the fact that hair is a priceless unit that adds a lot to our personality. Hence, it demands a lot of care and attention. Trying out different hairstyles through bleaching is a trend for a few years now.

While your hair stands out with it, there are also some risks associated with bleaching. People often try bleaching their hair more than once in their quest to get their perfect hair color. But, do you know the side effects of bleaching your hair twice in one day? Or even twice a month?

At SkinVeteran, our team of experts ensures you maintain healthy skin and hair. In this article, we will break down the facts on how often can you bleach your hair without causing any damage to it. 

Can You Bleach Your Hair Twice A day?

Never! No matter how good your hair condition is, experts do not recommend bleaching your hair twice in one day. It can significantly damage your hair and can cause severe hair fall.

Bleach contains potent oxidizing chemicals that can damage your hair. Therefore, the American Academy of Dermatology Association suggests not to bleach your hair more than once in 8 to 10 weeks.

However, if somehow your hair bleaching goes wrong, you can bleach your hair twice in one day (talk to an expert and get your hair health checked first). But forget about repeating this move in the years to come. 

How Long Should I Wait to Bleach My Hair Again?

It all depends on the health of your hair and its strength. You can bleach it again after a week if you have smooth and shiny hair with tapered ends after bleaching once.

However, in most cases, even one-time bleach damages your hair. Therefore, you should wait until your hair is ready to withstand another bleach.

Following are some crucial points to look at before deciding when to bleach your hair again.

  • The strength or health of your hair
  • Hair regrowth time
  • The ultimate color you want
  • Your hair care regime

According to dermatologists and hair stylists, a person with standard hair health and color can bleach her hair after every two weeks, if necessary. Having said that, bleaching your hair five to six times a year is something your hair shaft can easily withstand. 

Standard hair health means that your hair is not brittle, does not have split ends, does not fall on brushing or combing, and has standard color.

Risks Associated with Bleaching Hair More Often

Many celebrities like Hristina Aguilera, Billie Eilish, and Gwen Stefani took a little help from bleaching hair in building their careers. The different shades of blonde send out a strong statement that you can’t ignore us. So, how can we underestimate the power of bleaching hair?

However, unfortunately, bleaching is a chemical bomb for your hair and can damage it in multiple ways. Therefore, Ideally, one should avoid bleaching hair to the maximum extent.

For men and women with short hair, the problem is not that serious compared to people with longer hair because people with shorter hair can get haircuts often and can replace bleached strands with recently grown hair.

The following are some of the common risks associated with bleaching hair.

1. You Can Get Contact Dermatitis

Bleach contains potent chemicals like hydrogen peroxide. It is a strong oxidizing agent that can hurt your scalp quite easily. Therefore, chances are there for you to get allergic reactions.

One of them is contact dermatitis, in which your skin can show blisters, swelling, and dryness. As a result, you can experience hair loss and pain.

Skin experts recommend evaluation of the skin before going for hair bleaching. Therefore, you should apply bleach to a small patch to see what sort of reaction ensues. Also, you should avoid going for hair bleach more than twice a month.

2. Hair Will Become Too Dry

Dried-up hair is another repercussion of bleaching hair. Your hair keeps a small amount of water to help itself in creating stronger bonds and remain moisturized. However, bleach opens up the hair cuticle and extracts out almost all of the water. 

Therefore, if you are thinking of getting your hair bleached, moisturize it. So, it can withstand dryness. Secondly, also give enough rest to your hair before going for the second bleach.

3. Hair Becomes Prone to Damage

One thing about bleaching is pretty evident that it weakens your hair. After examining bleached hair under my lab microscope, I found out several ridges on the hair strand. The alkali that opens up the cuticle breaks the bond between the hair shaft and cuticle. 

Hair damage due to bleaching

Also, the oxidation done by hydrogen peroxide further damage the bonding.

The porous and dry hair can easily break while brushing or combing. You can also encounter excessive hair loss while shampooing the hair. That being the case, experts often suggest not to bleach fragile hair.

4. Hair will Require High Maintainance

As hair becomes dry and weak after bleaching, it will require high aftercare. You will be using different kinds of moisturizers and hair growth serums to keep it healthy and strong. Therefore, it may cost you extra money and time. 

How Long Does Hair Bleach Last?

Hair Bleaching is a chemical process in which an alkali compound like sodium persulfate opens up the hair cuticle (covering over hair shaft). After it, hydrogen peroxide, the pivotal bleaching agent, acts on the hair shaft. It takes away the standard color by dissolving a pigment called melanin.

So, you can not simply wash out the bleach. It is 100% permanent discoloration that stays out as long as the newer hair strand does not replace the bleached one.

You can only alter the color of your bleached hair by bleaching it again. And it is only possible after 20 to 25 days of the first bleach if you desire reasonably healthy hair.

How to Bleach Weak Hair?

Bleaching weak hair is always challenging. Therefore, you should consult a professional before going through the bleaching process. There are some recommendations from experts for bleaching fragile hair. Following these can minimize the damage of bleaching weaken hair.

1. Avoid DIY Bleaching For Very First Transformation

 Already weakened hair can not withstand the damage of bleach. Therefore, I will suggest you visit a professional during your first transformation.

The expert will be able to recommend you the best volume of bleach for your weak hair after analyzing your natural hair color and strength. Secondly, he will know the exact amount of time for bleach to stay in your hair.

After undergoing your first transformation, you can bleach your hair at home by keeping the following points in view.

2. Stop Washing Your Hair Two Days Before Bleach

According to studies, one should not wash her hair more than once a day. The rationale behind this statement is the natural oil in your hair. Scalp secretes oils to protect hair from dryness and damage. Excessive washing also wipes out those oils.

It is best not to wash your hair for two days before bleaching for you who already have weak hair. It will cause protective oils to develop in your hair and will prevent the possible damage of bleaching.

3. Give Rest to Your Hair Before Second Bleach

At the start of this article, we have answered a mostly asked question, “how often can you bleach your hair.” But that was for the people with healthy hair.

For you with fragile hair, 20 days’ rest is inevitable before the second bleach to avoid the bleaching damage.

4. Apply Coconut Oil Before Bleach

Coconut oil application before the bleach happens to be very effective in preventing damage. Therefore, apply an ample amount of it and leave it overnight in your hair. Also, do not wash it out before the bleach.

It will prevent the extra dryness and porosity caused by the potent chemical agents of the bleach. Coconut oil will also protect your scalp from getting any irritation and inflammation.


Hair bleaching is a modern rage that sets up the tone for many of us. But doing it often can cause substantial damage to your hair. Experts recommend not to bleach more than once in two months. However, if your hair is in good health, it can sustain bleaching once a month easily.