what problems did Nigeria encounter after oil was discovered there?

Read several articles in here ... carefully.

http://www.google.com/search?q=nigeria+oil+discovery&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

After the discovery of oil in Nigeria, the country faced several challenges, including:

1. Over-dependence on oil: Nigeria became heavily reliant on oil revenue, which led to neglect of other sectors such as agriculture and manufacturing. This over-dependence on oil made the country vulnerable to fluctuations in oil prices, leading to economic instability.

2. Dutch Disease: The influx of oil revenues led to currency appreciation, making non-oil exports less competitive. This phenomenon, known as the Dutch Disease, negatively impacted other sectors of the economy.

3. Corruption and Mismanagement: The discovery of oil also fueled corruption and mismanagement of resources. Political elites and foreign corporations often exploited the oil wealth for personal gain, leading to widespread corruption, embezzlement, and lack of investment in public services.

4. Environmental Degradation: The oil industry in Nigeria has had severe environmental consequences. Oil spills, gas flaring, and pollution have caused significant damage to the Niger Delta region, contaminating farmland, rivers, and communities. This has resulted in health issues, loss of livelihoods, and social unrest.

5. Social Inequality: The unequal distribution of oil wealth exacerbated socio-economic disparities in Nigeria. Majority of the population remained poor, while a small elite class enriched themselves through oil-related activities. This income inequality fueled social tension and contributed to unrest in different parts of the country.

It's important to note that while the above challenges can be attributable to the discovery of oil, they are also influenced by a combination of historical, political, and socio-economic factors. To delve deeper into each challenge and understand their complexities, one can consult academic research, policy reports, or resources from reputable international organizations that study Nigeria's socio-economic issues.