Will there be any side effects by using 2 percent of hydroquinone for long term use??? or can u please suggest me other night whitening creams

Yes. Aside from exogenous ochronosis and sun sensitivity, long-term hydroquinone use is also known to cause skin to get thick, leathery, and bumpy. Short-term side effects of hydroquinone include redness, irritation, and contact dermatitis.--no alternatives.