Why is my voice breaking? sometimes, i am asked to speak up because my voice is low. most of the time, i drink hot water to clear my voice.

Multiple reasons: Complaints like yours are often found in people who either chronic post nasal drip - pnd- (nasal drainage on to the vocal cords) or possibly even reflux. If its pnd, then i usually rec an anti-histamine. If its reflux then are otc reflux meds. A good history by your primary care md or an ENT will help point you to the right direction.

Can be a cancer: Are you a teenager? If you are male this is physiological. Anything that causes problems with approximation of the vocal cords, mobility in the cords or tension in the cords is a cause for hoarseness. This can be something as simple as vocal nodules or laryngitis but can also be a cancer. So go and see ENT doctor. One cannot make diagnosis on internet.