Too much cough with strain cause blood with cough. Take bolabaddharas one tab three a day with water. Tulsi syrup  crux two tsf three times a day is better.

He need to do chest xray and sputum test.

Age and general health of patient? Temperature if any? Any history of loss of weight? Chest X ray (PA) report? CBC, sputum for AFB.

Test Chest Xray

What is his age? Since when is he having cough. How much blood did he spit. It can be because of coughing hard. But I need details. 1. Do saline gargles daily. 2. Whenever possible do steam inhalation also. 3. Cover your nose and mouth with hanky for at least 30 sec when you go in dusty areas also when you go in and out of AC. As our nose is the most sensitive part of our body, When there is temperature difference between two rooms or inside n outside, then if we not protect our nose, it gets affected. 4. Drink Hot Liquids --Hot liquids relieve nasal congestion, prevent dehydration, and soothe the uncomfortably inflamed membranes that line your nose and throat. Homeopathic treatment has very encouraging results and gives relief in long term Consult online with details