A young girl, Charlotte, suffering from Dravet Syndrome experienced roughly 300 grand mal seizures weekly, she was lucky to have parents concerned and open minded enough to explore other natural medicine for her untreatable disease. Her parents were able to find her a strain of marijuana known as R4 which was extremely high in CBD and very low in THC, allowing Charolette to get the full benefits from the plant without getting "stoned". After extracting the oil from the plant, her parents are now able to control her seizures and she is down to roughly 2 or 3 a month. Anyone who says marijuana is harmful should look more into Charlotte Figi's story and how marijuana saved her life.
Health-wise, it's actually better to ingest marijuana, because by eating it instead of smoking it, there are no negative side-effects at all, because there is no smoke damaging your lungs.
High-wise, the effect lasts longer and it's more mellow, not to mention you have many delicious ways of ingesting it.
But drugs are bad. Intoxication is bad. Don't do it.
Because it gets you high and you then do things which you usually would not do and will probably regret later and this is true in many cases. Also it effects your immune system and makes you more susceptible to disease. Weed is a registered drug and can cause may long and short term issues. One short term issue I am noticing right now is your inability to spell. Weed can cause organ problems which will drastically effect your health.