Is ash gourd juice recommended for a sinus and asthma patient?

Yes, you can have ash gourd juice in case of sinus and asthma. It is highly detoxifying and helps in the removal of excess mucus from the body. 

However, please observe your body. If your condition worsens after taking ash gourd juice even after having it continuously for 5-6 days, it may not be suiting your body type. In that case, you can stop taking ash gourd juice and have the juice of any other vegetable. Please use your best judgement, and listen to the needs of your body.