The ache caused by fitness is caused by the accumulation of lactic acid. General soreness can be overcome by persisting in exercise, or by taking a rest, taking a warm bath and massaging. You can also apply plaster to relieve pain, such as Shangshi Zhitong Plaster, which can promote blood circulation and remove blood stasis, and is effective in eliminating soreness.
However, the pain is very serious, which may be a muscle strain or sprain. Sticking a plaster can solve the temporary pain and needs a doctor to solve it completely.