Fasting is one of the most important acts of worship that brings you closer to Allah SWT, as it strengthens good morals, piety, and patience within you. It also comes on the Day of Judgment as an intercessor for its companions, thus achieving salvation for you in this world and the Hereafter. This is because the fasting person has a supplication that is answered at the time of breaking the fast.

It helps the Muslim to stay away from forbidden desires. Due to the importance of fasting, many people ask about the invalidators of fasting. In this article, we will answer the question: can i do blood test while fasting in islam, along with mentioning the most well-known actions that invalidate the fast.

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Can I do blood test while fasting in islam?

Many Muslims, especially those who suffer from health problems and chronic diseases that require regular monitoring, ask: Can I do blood test while fasting in islam? The answer is: Yes, it is permissible for a Muslim to have the test if their health condition requires it.

Taking a blood sample does not invalidate the fast, according to the most reliable scholarly opinions. However, it is preferable, as a precaution and to avoid weakness, to take the sample after Iftar, especially if the quantity is relatively large, as the patient may feel severely weak and dizzy, which may hinder them from completing the fast properly.

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What are the Actions that Invalidate Fasting?

There are several conditions that must all be met for fasting to be invalidated, that this act is done intentionally, without compulsion, knowingly, and while being mindful. The Prophet, PBUH, said:

“Allah has relieved my Ummah from mistakes, forgetfulness, and what they are forced to do.”

«إن الله وضع عن أمتي الخطأ والنسيان وما استكرهوا عليه»

The actions that invalidate fasting are as follows:

  • Menstruation (Hayd) and postpartum bleeding (Nifas) in women: It was narrated from the Mother of the Believers, Aisha (may Allah be pleased with her), that the Prophet, PBUH, commanded them to make up the fast but did not command them to make up the prayer.
  • Smoking: And also the substances that the smoker consumes that contain harmful chemicals.
  • Nasal, ear, and eye drops: If the Muslim feels them in their throat, then this invalidates the fast, according to some scholars, but there is disagreement on this matter.
  • Intentional vomiting: The Messenger of Allah, PBUH, said:

“من ذرعه القيء فليس عليه قضاء، ومن استقاء عمدا فليقض”

“Whoever is overcome by vomiting does not have to make up (the fast), but whoever deliberately vomits must make up (the fast).”

  • Masturbation or intentional ejaculation: By touching the wife with desire, or masturbating followed by ejaculation, is considered as one of the invalidators of fasting according to most scholars.
  • Sexual intercourse: It is one of the most well-known invalidators of fasting.
  • Apostasy, leaving the religion, and insanity: Are among the invalidators of fasting that are unanimously agreed upon.
  • Cupping (Hijama): And the exit of some blood from the fasting person’s body as a result of this may invalidate the fast according to some scholars such as Imam Ahmad, while Imam Abu Hanifa, Imam Al-Shafi’i, and Imam Malik believed that it does not invalidate the fast.

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Taking Large Blood Samples While Fasting

In the context of explaining the ruling on having a blood test while fasting in Islam, some people ask about the ruling on taking large blood samples, because this matter may affect the patient’s health and make them feel weak. Therefore, they should consult their doctor to know if there is a risk to their life, and whether they need to compensate for the blood they have lost, especially if they feel very weak.

Here, they can break the fast and make up the day later. Therefore, scholars have differed in this matter; some of them believe that fasting is invalidated if the amount of blood drawn affects the health of the fasting person, and some of them believe that fasting is valid if the patient is not affected and is in good health. It is always preferable to have this test done after Iftar if it is possible to postpone it.

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Tips for Fasting People Who Need to Have Medical Tests

There are several tips that can help the fasting person during medical tests, which are as follows:

  • Be sure to eat healthy foods such as fruits and vegetables, because they provide the body with the required vitamins and nutrients and provide it with energy even during fasting.
  • It is preferable to choose the time of the test after Iftar so that their body does not weaken, and the patient must be sure to drink sufficient amounts of fluids, especially water, during Iftar to compensate for the loss.
  • It is preferable to consult the doctor about the required sample and you can wait until after Iftar if their condition is not urgent. But if the matter is necessary during fasting, then the amount that is drawn from the patient must be small, and they must monitor their vital signs.

If they feel very weak, they can break the fast so that their condition does not worsen.

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When is it Preferable to Have Medical Tests for the Fasting Person?

After answering the question: Can I do blood test while fasting in islam? It is necessary to know the best times to have medical tests so that the Muslim avoids any problem or doubt. It is preferable to have the test after Iftar so that no unexpected problems occur. They can have it after Suhoor or before Maghrib if the matter is urgent and cannot be postponed.

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Fasting for Those Who Suffer From Diseases That Require Frequent Blood Draws

Some people suffer from chronic diseases, such as high blood pressure, diabetes, and heart diseases, for example, and the doctor asks them to perform a set of tests and examinations every period in order to track their health condition and to make sure that things are going well.

If their health condition is deteriorating, or if fasting is a danger to their life, the patient must break the fast and follow the instructions of the treating doctor, while taking into account making up these days after the end of Ramadan.

As long as their condition requires frequent blood draws, they can break the fast if the amount of blood drawn is large and they feel exhausted and very tired, and they must consult scholars and specialists in this regard.

Fasting is a great pillar of Islam, and there are two types of fasting: obligatory fasting and voluntary fasting. The Muslim is keen to perform it well in order to gain the pleasure of Allah. There are many things that a Muslim may break their fast without realizing it. Therefore, some people ask: Can I do blood test while fasting in islam? We have explained that this is permissible as long as their health condition is not affected by it, while emphasizing the importance of consulting the doctor and scholars in all matters related to the rulings of fasting.

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