Answer

Yes. In Jain practice, if you are vomiting or unwell and cannot do any tap, you may brush your teeth twice using boiled water, especially for health and cleanliness.

Explanation

In Jain Dharma, care is taken to avoid unnecessary harm to living beings in water. Traditionally, using boiled and filtered water is preferred because boiling reduces water-bodied life forms, and filtered/settled boiled water is considered more suitable for careful use.

If your health condition requires brushing twice a day, then doing so with boiled water is appropriate. Illness is also a valid reason why one may not be able to observe austerities such as fasting or other tap.

Spiritual Understanding

Jain Dharma teaches both:

• Ahimsa — minimizing harm as much as possible
• Vivek — wise and practical conduct according to one’s condition

When the body is sick, maintaining basic hygiene and preventing further illness is important. You can still keep Jain awareness by using boiled water carefully, avoiding wastage, and maintaining inner calm and repentance if any unavoidable harm occurs.

Takeaway

Brush as needed for your health, use boiled water carefully, and do not feel guilty if illness prevents you from doing tap. Jain Dharma values sincere intention, awareness, and compassion.